38 results on '"Valkenburg O"'
Search Results
2. O-182 No higher prevalence of metabolic dysfunction among subfertile women in an urban population
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Van Bree, B, primary, Pattinaja, D, additional, Bons, J, additional, Spaanderman, M, additional, Valkenburg, O, additional, and Van Golde, R, additional
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- 2022
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3. Relationship between de novo lipogenesis and serum sex hormone binding globulin in humans
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Simons, P., Valkenburg, O., Telgenkamp, I., Waaij, K.M. van der, Groot, D.M. de, Veeraiah, P., Bons, J.A.P., Taskinen, M.R., Borén, J., Schrauwen, P., Rutten, J.H.W., Cassiman, D., Schalkwijk, C.G., Stehouwer, C.D.A., Schrauwen-Hinderling, V.B., Hodson, L., Brouwers, M., Simons, P., Valkenburg, O., Telgenkamp, I., Waaij, K.M. van der, Groot, D.M. de, Veeraiah, P., Bons, J.A.P., Taskinen, M.R., Borén, J., Schrauwen, P., Rutten, J.H.W., Cassiman, D., Schalkwijk, C.G., Stehouwer, C.D.A., Schrauwen-Hinderling, V.B., Hodson, L., and Brouwers, M.
- Abstract
Item does not contain fulltext, OBJECTIVE: Obesity and liver fat are associated with decreased levels of serum sex hormone binding globulin (SHBG). Laboratory studies suggest that hepatic de novo lipogenesis (DNL) is involved in the downregulation of SHBG synthesis. The aim of the present study was to address the role of DNL on serum SHBG in humans. DESIGN: A cross-sectional study examining the association between DNL, measured by stable isotopes, and serum SHBG, stratified by sex. PARTICIPANTS: Healthy men (n = 34) and women (n = 21) were combined from two cross-sectional studies. Forty-two per cent of participants had hepatic steatosis, and the majority were overweight (62%) or obese (27%). RESULTS: DNL was inversely associated with SHBG in women (β: -0.015, 95% CI: -0.030; 0.000), but not in men (β: 0.007, 95% CI: -0.005; 0.019) (p for interaction = .068). Adjustment for study population, age and body mass index did not materially change these results, although statistical significance was lost after adjustment for serum insulin. CONCLUSIONS: An inverse association between DNL and SHBG may explain the decreased SHBG levels that are observed in obesity, at least in women.
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- 2021
4. Genetic polymorphisms of the glucocorticoid receptor may affect the phenotype of women with anovulatory polycystic ovary syndrome
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Valkenburg, O., Uitterlinden, A.G., Themmen, A.P., de Jong, F.H., Hofman, A., Fauser, B.C.J.M., and Laven, J.S.E.
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- 2011
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5. Genetic Ancestry Affects the Phenotype of Normogonadotropic Anovulatory (WHOII) Subfertility
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Valkenburg, O., Lao, O., Schipper, I., Louwers, Y., Uitterlinden, A. G., Kayser, M., and Laven, J. S. E.
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- 2011
6. Fertility and Ovarian Function in High-Dose Estrogen-Treated Tall Women
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Hendriks, A. E. J., Laven, J. S. E., Valkenburg, O., Fong, S. Lie, Fauser, B. C. J. M., de Ridder, M. A. J., de Jong, F. H., Visser, J. A., van Ginneken, A. M., Boot, A. M., and Drop, S. L. S.
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- 2011
7. Psychological well-being and sexarche in women with polycystic ovary syndrome
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de Niet, J.E., de Koning, C.M., Pastoor, H., Duivenvoorden, H.J., Valkenburg, O., Ramakers, M.J., Passchier, J., de Klerk, C., and Laven, J.S.E.
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- 2010
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8. Genetic polymorphisms of GnRH and gonadotrophic hormone receptors affect the phenotype of polycystic ovary syndrome
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Valkenburg, O, Uitterlinden, AG, Piersma, D, Hofman, A, Themmen, APN, de Jong, FH, Fauser, BCJM, and Laven, JSE
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- 2009
9. PCOS according to the Rotterdam consensus criteria: change in prevalence among WHO-II anovulation and association with metabolic factors
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Broekmans, F J, Knauff, E AH, Valkenburg, O, Laven, J S, Eijkemans, M J, and Fauser, B CJM
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- 2006
10. Ovarian reserve status and cardiovascular function in women after a hypertensive complicated pregnancy
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Jorissen, L.M., primary, Pattinaja, D.A., additional, Bons, J.A., additional, Valkenburg, O., additional, Spaanderman, M.E., additional, and Golde, R.V., additional
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- 2018
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11. Polycystic Ovary Syndrome
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Valkenburg, O. (Olivier) and Valkenburg, O. (Olivier)
- Abstract
__Abstract__ The polycystic ovary syndrome (PCOS) was first described in 1935 by Stein and Leventhal as an association of amenorrhoea, obesity and a typical, polycystically enlarged, appearance of the ovaries at laparatomy1. Taking into account the absence of advanced imaging techniques and the relatively high risk that was associated with abdominal surgery at that time, it is remarkable that this association was noted, and published, as early as 1935. Perhaps this fact alone serves best to demonstrate the wide impact on population health that is associated with the syndrome that is currently recognised as PCOS. It is the most frequently occurring endocrinopathy among women of reproductive age, with an estimated prevalence of 5-10 % among women of fertile age. The ovulatory disorder that accompanies PCOS is the cause of subfertility and is often the most important reason for affected women to seek medical care. Furthermore, the clinical phenotype of PCOS is characterised by signs of elevated levels of free circulating androgens such as hirsutism, acne and male pattern baldness. However it is important to note that, no matter what diagnostic criteria are used, PCOS constitutes a notoriously heterogeneous phenotype. Due to the absence of a robust aetiologic framework for the pathogenesis of PCOS, physicians are not able to provide a single uniform definition that performs as an accurate diagnostic tool for the diagnosis of PCOS. Therefore, the diagnosis is still based on its description as a
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- 2015
12. Psychological well-being and sexarche in women with polycystic ovary syndrome
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Niet, J.E. (Judith) de, Koning, C.M. de, Pastoor, H., Duivenvoorden, H.J. (Hugo), Valkenburg, O. (Olivier), Ramakers, M.J., Passchier, J. (Jan), Klerk, C. (Cora) de, Laven, J.S.E. (Joop), Niet, J.E. (Judith) de, Koning, C.M. de, Pastoor, H., Duivenvoorden, H.J. (Hugo), Valkenburg, O. (Olivier), Ramakers, M.J., Passchier, J. (Jan), Klerk, C. (Cora) de, and Laven, J.S.E. (Joop)
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Background The characteristics of polycystic ovary syndrome (PCOS) such as hyperandrogenism and anovulation can be highly stressful and might negatively affect psychological well-being and sexuality. The objective of this study was to evaluate the association between PCOS characteristics and psychological well-being as well as sexarche. Methods Patients (n = 1148) underwent standardized clinical evaluation. Psychological well-being was investigated in 480 patients with the Rosenberg self-esteem scale (RSES), the body cathexis scale (BCS) and the fear of negative appearance evaluation scale (FNAES). Sexarche was also assessed. Result SAmenorrhoea was associated with lower self-esteem (P = 0.03), greater fear of negative appearance evaluation (P = 0.01) and earlier sexarche (P= 0.004). Hyperandrogenism and acne were associated with poorer body satisfaction (P = 0.03, 0.02, respectively). Hirsutism and BMI were negatively associated with all psychological variables (RSES, P = 0.01; BCS, P = 0.05; FNAES, P = 0.02 and RSES, P = 0.03; BCS, P = 0.001; FNAES, P = 0.03, respectively). Conclusions Our Results suggest that menstrual irregularities might be related to sexarche. Moreover, this study stresses that the treatment of women with PCOS should notably focus on physical but also on psychological and sexual characteristics.
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- 2010
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13. A more atherogenic serum lipoprotein profile is present in women with polycystic ovary syndrome: A case-control study
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Valkenburg, O. (Olivier), Steegers-Theunissen, R.P.M. (Régine), Smedts, H.P.M. (Dineke), Dallinga-Thie, G.M. (Geesje), Fauser, B.C.J.M. (Bart), Westerveld, E.H. (Egbertine), Laven, J.S.E. (Joop), Valkenburg, O. (Olivier), Steegers-Theunissen, R.P.M. (Régine), Smedts, H.P.M. (Dineke), Dallinga-Thie, G.M. (Geesje), Fauser, B.C.J.M. (Bart), Westerveld, E.H. (Egbertine), and Laven, J.S.E. (Joop)
- Abstract
Context: Polycystic ovary syndrome (PCOS) is associated with a higher frequency of cardiovascular risk factors. Apolipoprotein (apo) A-I and apoB are potent markers for cardiovascular risk. Data on apo levels in women with PCOS are scarce and contradictory. Objective: Our objective was to identify changes in lipid metabolism in women with PCOS, and the relative impact of obesity, insulin resistance, and hyperandrogenism on lipid parameters. Design: This was a case-control study. Setting: The study was performed at a single referral center. Subjects: PCOS was diagnosed according to the 2003 Rotterdam criteria. Healthy mothers with regular menstrual cycles served as controls. Main Outcome Parameters: Fasting insulin, triglycerides (TGs), cholesterol, high-density lipoprotein (HDL)-cholesterol, apoA-I, and apoB were determined. Low-density lipoprotein (LDL)-cholesterol was calculated using the Friedewald formula. Results: We included 557 women with PCOS and 295 controls. After correction for age and body mass index, PCOS women had higher median levels of insulin (10.1 vs. 6.9 mU/liter), TGs (95 vs. 81 mg/dl), cholesterol (196 vs. 178 mg/dl), and LDL-cholesterol (125 vs. 106 mg/dl) in combination with lower levels of HDL-cholesterol (46 vs. 55 mg/dl) and apoA-I (118 vs. 146 mg/dl) compared with controls (all P values ≤ 0.01). apoB levels were similar in cases and controls. Free androgen index, body mass index, SHBG, and estradiol were independent predictors of apoA-I levels inwomenwith PCOS. Conclusions: PCOS is associated with a more pronounced atherogenic lipid profile. Furthermore, obesity and hyperandrogenism contribute to an adverse lipid profile. Finally, PCOS seems to constitute an additional risk factor for an atherogenic lipid profile. Copyright
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- 2008
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14. A derangement of the maternal lipid profile is associated with an elevated risk of congenital heart disease in the offspring
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Smedts, H.P.M., primary, van Uitert, E.M., additional, Valkenburg, O., additional, Laven, J.S.E., additional, Eijkemans, M.J.C., additional, Lindemans, J., additional, Steegers, E.A.P., additional, and Steegers-Theunissen, R.P.M., additional
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- 2012
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15. The role of anti-müllerian hormone in the classification of anovulation
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Fong, S. Lie, primary, Schipper, I., additional, Valkenburg, O., additional, de Jong, F.H., additional, Visser, J.A., additional, and Laven, J.S.E., additional
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- 2011
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16. FSH receptor polymorphism predicts outcome of ovulation induction in WHO-II anovulatory subfertility
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Valkenburg, O., primary, Lambalk, N.B., additional, van Santbrink, E.J.P., additional, Uitterlinden, A.G., additional, Fauser, B.C.J.M., additional, and Laven, J.S.E., additional
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- 2011
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17. A less severe phenotype in ovulatory women with polycystic ovary syndrome (PCOS)
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Burgers, J.A., primary, Lie Fong, S., additional, Louwers, Y.V., additional, Valkenburg, O., additional, and Laven, J.S.E., additional
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- 2009
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18. The phenotype of polycystic ovary syndrome (PCOS) ameliorates with aging
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Brown, Z.A., primary, Louwers, Y.V., additional, Lie Fong, S., additional, Valkenburg, O., additional, and Laven, J.S.E., additional
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- 2009
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19. Variants in the ACVR1 gene are associated with AMH levels in women with polycystic ovary syndrome
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Kevenaar, M. E., primary, Themmen, A. P.N., additional, van Kerkwijk, A. J., additional, Valkenburg, O., additional, Uitterlinden, A. G., additional, de Jong, F. H., additional, Laven, J. S.E., additional, and Visser, J. A., additional
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- 2008
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20. Insulin resistance and dyslipidemia in women with polycystic ovary syndrome (PCOS), a case control study
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Valkenburg, O., primary, Steegers-Theunissen, R.P.M., additional, Smedts, H.P.M., additional, Fauser, B.C.J.M., additional, Westerveld, T.E., additional, and Laven, J.S.E., additional
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- 2007
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21. Hysterosalpingo-foam sonography versus hysterosalpingography during fertility work-up: an economic evaluation alongside a randomized controlled trial.
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Kamphuis D, van Eekelen R, van Welie N, Dreyer K, van Rijswijk J, van Hooff MHA, de Bruin JP, Verhoeve HR, Mol F, van Baal WM, Traas MAF, van Peperstraten AM, Manger AP, Gianotten J, de Koning CH, Koning AMH, Bayram N, van der Ham DP, Vrouenraets FPJM, Kalafusova M, van de Laar BIG, Kaijser J, Lambeek AF, Meijer WJ, Broekmans FJM, Valkenburg O, van der Voet LF, van Disseldorp J, Lambers MJ, Tros R, Lambalk CB, Stoker J, van Wely M, Bossuyt PMM, Mol BWJ, and Mijatovic V
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- Humans, Female, Adult, Pregnancy, Cost-Benefit Analysis, Pregnancy Rate, Live Birth, Birth Rate, Hysterosalpingography methods, Hysterosalpingography economics, Infertility, Female therapy, Infertility, Female economics, Fallopian Tube Patency Tests methods, Fallopian Tube Patency Tests economics, Ultrasonography economics, Ultrasonography methods
- Abstract
Study Question: What are the costs and effects of tubal patency testing by hysterosalpingo-foam sonography (HyFoSy) compared to hysterosalpingography (HSG) in infertile women during the fertility work-up?, Summary Answer: During the fertility work-up, clinical management based on the test results of HyFoSy leads to slightly lower, though not statistically significant, live birth rates, at lower costs, compared to management based on HSG results., What Is Known Already: Traditionally, tubal patency testing during the fertility work-up is performed by HSG. The FOAM trial, formally a non-inferiority study, showed that management decisions based on the results of HyFoSy resulted in a comparable live birth rate at 12 months compared to HSG (46% versus 47%; difference -1.2%, 95% CI: -3.4% to 1.5%; P = 0.27). Compared to HSG, HyFoSy is associated with significantly less pain, it lacks ionizing radiation and exposure to iodinated contrast medium. Moreover, HyFoSy can be performed by a gynaecologist during a one-stop fertility work-up. To our knowledge, the costs of both strategies have never been compared., Study Design, Size, Duration: We performed an economic evaluation alongside the FOAM trial, a randomized multicenter study conducted in the Netherlands. Participating infertile women underwent, both HyFoSy and HSG, in a randomized order. The results of both tests were compared and women with discordant test results were randomly allocated to management based on the results of one of the tests. The follow-up period was twelve months., Participants/materials, Setting, Methods: We studied 1160 infertile women (18-41 years) scheduled for tubal patency testing. The primary outcome was ongoing pregnancy leading to live birth. The economic evaluation compared costs and effects of management based on either test within 12 months. We calculated incremental cost-effectiveness ratios (ICERs): the difference in total costs and chance of live birth. Data were analyzed using the intention to treat principle., Main Results and the Role of Chance: Between May 2015 and January 2019, 1026 of the 1160 women underwent both tubal tests and had data available: 747 women with concordant results (48% live births), 136 with inconclusive results (40% live births), and 143 with discordant results (41% had a live birth after management based on HyFoSy results versus 49% with live birth after management based on HSG results). When comparing the two strategies-management based on HyfoSy results versus HSG results-the estimated chance of live birth was 46% after HyFoSy versus 47% after HSG (difference -1.2%; 95% CI: -3.4% to 1.5%). For the procedures itself, HyFoSy cost €136 and HSG €280. When costs of additional fertility treatments were incorporated, the mean total costs per couple were €3307 for the HyFoSy strategy and €3427 for the HSG strategy (mean difference €-119; 95% CI: €-125 to €-114). So, while HyFoSy led to lower costs per couple, live birth rates were also slightly lower. The ICER was €10 042, meaning that by using HyFoSy instead of HSG we would save €10 042 per each additional live birth lost., Limitations, Reasons for Caution: When interpreting the results of this study, it needs to be considered that there was a considerable uncertainty around the ICER, and that the direct fertility enhancing effect of both tubal patency tests was not incorporated as women underwent both tubal patency tests in this study., Wider Implication of the Findings: Compared to clinical management based on HSG results, management guided by HyFoSy leads to slightly lower live birth rates (though not statistically significant) at lower costs, less pain, without ionizing radiation and iodinated contrast exposure. Further research on the comparison of the direct fertility-enhancing effect of both tubal patency tests is needed., Study Funding/competing Interest(s): FOAM trial was an investigator-initiated study, funded by ZonMw, a Dutch organization for Health Research and Development (project number 837001504). IQ Medical Ventures provided the ExEm®-FOAM kits free of charge. The funders had no role in study design, collection, analysis, and interpretation of the data. K.D. reports travel-and speakers fees from Guerbet and her department received research grants from Guerbet outside the submitted work. H.R.V. received consulting-and travel fee from Ferring. A.M.v.P. reports received consulting fee from DEKRA and fee for an expert meeting from Ferring, both outside the submitted work. C.H.d.K. received travel fee from Merck. F.J.M.B. received a grant from Merck and speakers fee from Besins Healthcare. F.J.M.B. is a member of the advisory board of Merck and Ferring. J.v.D. reported speakers fee from Ferring. J.S. reports a research agreement with Takeda and consultancy for Sanofi on MR of motility outside the submitted work. M.v.W. received a travel grant from Oxford Press in the role of deputy editor for Human Reproduction and participates in a DSMB as independent methodologist in obstetrics studies in which she has no other role. B.W.M. received an investigator grant from NHMRC GNT1176437. B.W.M. reports consultancy for ObsEva, Merck, Guerbet, iGenomix, and Merck KGaA and travel support from Merck KGaA. V.M. received research grants from Guerbet, Merck, and Ferring and travel and speakers fees from Guerbet. The other authors do not report conflicts of interest., Trial Registration Number: International Clinical Trials Registry Platform No. NTR4746., (© The Author(s) 2024. Published by Oxford University Press on behalf of European Society of Human Reproduction and Embryology.)
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- 2024
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22. No evidence for a diminished ovarian reserve among patients with hypertensive disorders of pregnancy: a case control study.
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van Bree BE, Jorissen LM, Pattinaja DAPM, Bons JAP, Spaanderman MEA, Valkenburg O, and van Golde RJT
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- Pregnancy, Humans, Female, Case-Control Studies, Retrospective Studies, Hypertension, Pregnancy-Induced, Ovarian Reserve, Ovarian Diseases
- Abstract
Background: Existing evidence suggests a relation between cardiovascular dysfunction and diminished ovarian reserve. While it is known that pre-existent cardiovascular dysfunction is also associated with the development of preeclampsia (PE) during pregnancy, we hypothesize that signs of diminished ovarian reserve may occur more frequently among women with a history of hypertensive disorders of pregnancy (HDP). The aim of our study was therefore to analyse if women with a history of HDP show signs of diminished ovarian reserve, represented by lower anti-Mullarian hormone (AMH) levels, compared to controls. For this retrospective observational case control study, patients included women with a history of HDP, whereas controls constituted of women with a history of an uncomplicated pregnancy. The study was conducted in a tertiary referral centre in which all women underwent a one-time cardiovascular and metabolic assessment. Ovarian reserve and markers of cardiovascular function were evaluated, adjusted for age and body mass index (BMI) using linear regression analyses., Results: 163 patients and 81 controls were included over a time span of 3 years. No signs of diminished ovarian reserve i.e. lower AMH level were observed in the patient group versus controls. A subgroup analysis even showed higher AMH levels in late onset HDP as compared to controls (2.8 vs. 2.0 µg/L, p = 0.025). As expected, cardiovascular function markers were significantly less favourable in the patient group compared to controls; higher levels of systolic blood pressure (BP) (5%), diastolic BP (4%), triglycerides (29%), glucose (4%) and insulin levels (81%) (all p < 0.05), whereas high density lipid (HDL) cholesterol was 12% lower (NS)., Conclusions: Despite unfavourable cardiovascular risk profile, the present study does not substantiate the hypothesis that women with HDP show accelerated ovarian ageing as compared to healthy parous controls. Although HDP patients should be warned about their cardiovascular health, they shouldn't be concerned about unfavourable ovarian reserve status., (© 2024. The Author(s).)
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- 2024
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23. Serum sex hormone-binding globulin is a mediator of the association between intrahepatic lipid content and type 2 diabetes: the Maastricht Study.
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Simons PIHG, Valkenburg O, van de Waarenburg MPH, van Greevenbroek MMJ, Kooi ME, Jansen JFA, Schalkwijk CG, Stehouwer CDA, and Brouwers MCGJ
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- Female, Humans, Cohort Studies, Cross-Sectional Studies, Lipids, Male, Diabetes Mellitus, Type 2, Sex Hormone-Binding Globulin, Liver metabolism
- Abstract
Aims/hypothesis: Serum sex hormone-binding globulin (SHBG) has been proposed to act as a hepatokine that contributes to the extrahepatic complications observed in non-alcoholic fatty liver disease (NAFLD). However, it remains uncertain whether serum SHBG mediates the association between intrahepatic lipids (IHL) and type 2 diabetes. Therefore, we studied whether, and to what extent, serum SHBG mediates the association between IHL content and type 2 diabetes., Methods: We used cross-sectional data from the Maastricht Study (n=1554), a population-based cohort study with oversampling of individuals with type 2 diabetes. Type 2 diabetes status was assessed by oral glucose tolerance test, and IHL content was measured using 3T Dixon MRI. Mediation analyses were performed to assess the role of serum SHBG in mediating the association between IHL content and type 2 diabetes., Results: IHL content was significantly associated with type 2 diabetes in women and men (OR 1.08 [95% CI 1.04, 1.14] and OR 1.12 [95% CI 1.08, 1.17], respectively). Serum SHBG significantly mediated the association between IHL content and type 2 diabetes. The contribution of serum SHBG was higher in women (OR 1.04 [95% CI 1.02, 1.07]; proportion mediated 50.9% [95% CI 26.7, 81.3]) than in men (OR 1.02 [95% CI 1.01, 1.03]; proportion mediated 17.2% [95% CI 9.6, 27.6]). Repeat analyses with proxies of type 2 diabetes and adjustment for covariates did not substantially affect the results., Conclusions/interpretation: In this large-scale population-based cohort study, serum SHBG was found to be a mediator of the association between IHL content and type 2 diabetes. These findings extend our understanding of the potential mechanisms by which NAFLD is a risk factor for type 2 diabetes, and further elaborate on the role of SHBG as a hepatokine., (© 2022. The Author(s).)
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- 2023
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24. Association between de novo lipogenesis susceptibility genes and coronary artery disease.
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Simons PIHG, Valkenburg O, Stehouwer CDA, and Brouwers MCGJ
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- Humans, Lipogenesis genetics, Liver metabolism, Fatty Acids metabolism, Non-alcoholic Fatty Liver Disease diagnosis, Non-alcoholic Fatty Liver Disease epidemiology, Non-alcoholic Fatty Liver Disease genetics, Coronary Artery Disease diagnosis, Coronary Artery Disease epidemiology, Coronary Artery Disease genetics
- Abstract
Background and Aims: Coronary artery disease (CAD) is the principal cause of death in individuals with non-alcoholic fatty liver disease (NAFLD). The aim of this study was to use genetic epidemiology to study the association between de novo lipogenesis (DNL), one of the major pathways leading to NAFLD, and CAD risk., Methods and Results: DNL susceptibility genes were used as instruments and selected using three approaches: 1) genes that are associated with both high serum triglycerides and low sex hormone-binding globulin, both downstream consequences of DNL (unbiased approach), 2) genes that have a known role in DNL (biased approach), and 3) genes that have been associated with serum fatty acids, used as a proxy of DNL. Gene-CAD effect estimates were retrieved from the meta-analysis of CARDIoGRAM and the UK Biobank (∼76014 cases and ∼264785 controls). Effect estimates were clustered using a fixed-effects meta-analysis. Twenty-two DNL susceptibility genes were identified by the unbiased approach, nine genes by the biased approach and seven genes were associated with plasma fatty acids. Clustering of genes selected in the unbiased and biased approach showed a statistically significant association with CAD (OR:1.016, 95%CI:1.012; 1.020 and OR:1.013, 95%CI:1.007; 1.020, respectively), while clustering of fatty acid genes did not (OR:1.004, 95%CI:0.996-1.011). Subsequent exclusion of potential influential outliers did reveal a statistically significant association (OR:1.009, 95%CI:1.000; 1.018)., Conclusions: DNL susceptibility genes are associated with an increased risk of CAD. These findings suggest that DNL may be involved in the pathogenesis of CAD and favor further development of strategies that target NAFLD through DNL., Competing Interests: Declaration of competing interest The authors declare that there is no competing interests., (Copyright © 2022 The Author(s). Published by Elsevier B.V. All rights reserved.)
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- 2022
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25. Can hysterosalpingo-foam sonography replace hysterosalpingography as first-choice tubal patency test? A randomized non-inferiority trial.
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van Welie N, van Rijswijk J, Dreyer K, van Hooff MHA, de Bruin JP, Verhoeve HR, Mol F, van Baal WM, Traas MAF, van Peperstraten AM, Manger AP, Gianotten J, de Koning CH, Koning AMH, Bayram N, van der Ham DP, Vrouenraets FPJM, Kalafusova M, van de Laar BIG, Kaijser J, Lambeek AF, Meijer WJ, Broekmans FJM, Valkenburg O, van der Voet LF, van Disseldorp J, Lambers MJ, Tros R, Lambalk CB, Stoker J, van Wely M, Bossuyt PMM, Mol BWJ, and Mijatovic V
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- Adolescent, Adult, Female, Humans, Male, Pain, Pregnancy, Pregnancy Rate, Prospective Studies, Young Adult, Hysterosalpingography adverse effects, Infertility, Female diagnostic imaging, Infertility, Female therapy
- Abstract
Study Question: Does hysterosalpingo-foam sonography (HyFoSy) lead to similar pregnancy outcomes, compared with hysterosalpingography (HSG), as first-choice tubal patency test in infertile couples?, Summary Answer: HyFoSy and HSG produce similar findings in a majority of patients and clinical management based on the results of either HyFoSy or HSG, leads to comparable pregnancy outcomes. HyFoSy is experienced as significantly less painful., What Is Known Already: Traditionally, tubal patency testing during fertility work-up is performed by HSG. HyFoSy is an alternative imaging technique lacking ionizing radiation and iodinated contrast medium exposure which is less expensive than HSG. Globally, there is a shift towards the use of office-based diagnostic methods, such as HyFoSy., Study Design, Size, Duration: This multicentre, prospective, comparative study with a randomized design was conducted in 26 hospitals in The Netherlands. Participating women underwent both HyFoSy and HSG in randomized order. In case of discordant results, women were randomly allocated to either a management strategy based on HyFoSy or one based on HSG., Participants/materials, Setting, Methods: We included infertile women between 18 and 41 years old who were scheduled for tubal patency testing during their fertility work-up. Women with anovulatory cycles not responding to ovulation induction, endometriosis, severe male infertility or a known iodine contrast allergy were excluded. The primary outcome for the comparison of the HyFoSy- and HSG-based strategies was ongoing pregnancy leading to live birth within 12 months after inclusion in an intention-to-treat analysis., Main Results and the Role of Chance: Between May 2015 and January 2019, 1026 women underwent HyFoSy and HSG. HyFoSy was inconclusive in 97 of them (9.5%), HSG was inconclusive in 30 (2.9%) and both were inconclusive in 9 (0.9%). In 747 women (73%) conclusive tests results were concordant. Of the 143/1026 (14%) with discordant results, 105 were randomized to clinical management based on the results of either HyFoSy or HSG. In this group, 22 of the 54 women (41%) allocated to management based on HyFoSy and 25 of 51 women (49%) allocated to management based on HSG had an ongoing pregnancy leading to live birth (Difference -8%; 95% CI: -27% to 10%). In total, clinical management based on the results of HyFoSy was estimated to lead to a live birth in 474 of 1026 women (46%) versus 486 of 1026 (47%) for management based on HSG (Difference -1.2%; 95% CI: -3.4% to 1.5%). Given the pre-defined margin of -2%, statistically significant non-inferiority of HyFoSy relative to HSG could not be demonstrated (P = 0.27). The mean pain score for HyFoSy on the 1-10 Visual Analogue Scale (VAS) was 3.1 (SD 2.2) and the mean VAS pain score for HSG was 5.4 (SD 2.5; P for difference < 0.001)., Limitations, Reasons for Caution: Since all women underwent both tubal patency tests, no conclusions on a direct therapeutic effect of tubal flushing could be drawn., Wider Implications of the Findings: HyFoSy or HSG produce similar tubal pathology findings in a majority of infertile couples and, where they differ, a difference in findings does not lead to substantial difference in pregnancy outcome, while HyFoSy is associated with significantly less pain., Study Funding/competing Interest(s): The FOAM study was an investigator-initiated study funded by ZonMw, The Netherlands organization for Health Research and Development (project number 837001504). ZonMw funded the whole project. IQ Medical Ventures provided the ExEm-foam® kits free of charge. The funders had no role in study design, collection, analysis and interpretation of the data. K.D. reports travel and speaker fees from Guerbet. F.J.M.B. reports personal fees as a member of the external advisory board for Merck Serono, The Netherlands, and a research support grant from Merck Serono, outside the submitted work. C.B.L. reports speakers' fee from Ferring in the past, and his department receives research grants from Ferring, Merck and Guerbet. J.S. reports a research agreement with Takeda on MR of motility outside the submitted work. M.V.W. reports leading The Netherlands Satellite of the Cochrane Gynaecology and Fertility Group. B.W.J.M. is supported by an NHMRC Investigator grant (GNT1176437). B.W.J.M. reports consultancy for Guerbet and research funding from Merck and Guerbet. V.M. reports non-financial support from IQ medicals ventures, during the conduct of the study; grants and personal fees from Guerbet, outside the submitted work. The other authors do not report conflicts of interest., Trial Registration Number: NTR4746/NL4587 (https://www.trialregister.nl)., Trial Registration Date: 19 August 2014., Date of First Patient’s Enrolment: 7 May 2015., (© The Author(s) 2022. Published by Oxford University Press on behalf of European Society of Human Reproduction and Embryology.)
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- 2022
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26. Causal relationship between polycystic ovary syndrome and coronary artery disease: A Mendelian randomisation study.
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Simons PIHG, Cornelissen MEB, Valkenburg O, Onland-Moret NC, van der Schouw YT, Stehouwer CDA, Burgess S, and Brouwers MCGJ
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- Female, Genome-Wide Association Study, Humans, Mendelian Randomization Analysis, Obesity complications, Obesity genetics, Coronary Artery Disease epidemiology, Coronary Artery Disease genetics, Polycystic Ovary Syndrome complications, Polycystic Ovary Syndrome genetics
- Abstract
Objective: Polycystic ovary syndrome (PCOS) has been associated with an increased risk of coronary artery disease (CAD). However, it remains uncertain whether this increased risk is the result of PCOS per se or, alternatively, is explained by obesity, a common feature of PCOS. The aim of this study was to assess the causal association between PCOS and CAD and the role of obesity herein., Design and Methods: We conducted two-sample Mendelian randomisation analyses in large-scale, female-specific datasets to study the association between genetically predicted (1) risk of PCOS and risk of CAD, (2) body mass index (BMI) and risk of PCOS and (3) BMI and risk of CAD. Primary analyses were conducted with the inverse-variance weighted (IVW) method. Simple median, penalized weighted median and contamination mixture analyses were performed to assess the robustness of the outcomes., Results: IVW analyses did not show a statistically significant association between PCOS and CAD (odds ratio [OR]: 0.99, 95% confidence interval [CI]: 0.89, 1.11). In contrast, genetically predicted BMI was statistically significantly associated with an increased odds of PCOS (OR: 3.21, 95% CI: 2.26, 4.56) and CAD (OR: 1.38, 95% CI: 1.14, 1.67). Similar results were obtained when secondary analyses were performed., Conclusion: These sex-specific analyses show that the genetically predicted risk of PCOS is not associated with the risk of CAD. Instead, the genetically predicted risk of obesity (and its downstream metabolic effects) is the common denominator of both PCOS and CAD risk., (© 2021 The Authors. Clinical Endocrinology Published by John Wiley & Sons Ltd.)
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- 2022
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27. Sex hormone-binding globulin: biomarker and hepatokine?
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Simons PIHG, Valkenburg O, Stehouwer CDA, and Brouwers MCGJ
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- Biomarkers, Female, Genome-Wide Association Study, Humans, Diabetes Mellitus, Type 2 genetics, Polycystic Ovary Syndrome genetics, Sex Hormone-Binding Globulin genetics
- Abstract
Over the past decade, there have been important breakthroughs in our understanding of the regulation and function of sex hormone-binding globulin (SHBG). A recent genome-wide association and Mendelian randomization study has provided new insights at the population level. Thorough study of genetic variants affecting serum SHBG has identified de novo lipogenesis as one of the mechanistic links between the metabolic syndrome and reduced serum SHBG levels in humans. Furthermore, careful deduction of the Mendelian randomization results suggests a direct, causal role for SHBG in the pathogenesis of type 2 diabetes, as a hepatokine, in women. These findings prompt the development of SHBG-raising therapies as a means to prevent or treat disorders such as type 2 diabetes and polycystic ovary syndrome., Competing Interests: Declaration of interests The authors have no interests to declare., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
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- 2021
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28. Relationship between de novo lipogenesis and serum sex hormone binding globulin in humans.
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Simons PIHG, Valkenburg O, Telgenkamp I, van der Waaij KM, de Groot DM, Veeraiah P, Bons JAP, Taskinen MR, Borén J, Schrauwen P, Rutten JHW, Cassiman D, Schalkwijk CG, Stehouwer CDA, Schrauwen-Hinderling VB, Hodson L, and Brouwers MCGJ
- Subjects
- Body Mass Index, Cross-Sectional Studies, Female, Humans, Lipogenesis, Male, Fatty Liver, Sex Hormone-Binding Globulin metabolism
- Abstract
Objective: Obesity and liver fat are associated with decreased levels of serum sex hormone binding globulin (SHBG). Laboratory studies suggest that hepatic de novo lipogenesis (DNL) is involved in the downregulation of SHBG synthesis. The aim of the present study was to address the role of DNL on serum SHBG in humans., Design: A cross-sectional study examining the association between DNL, measured by stable isotopes, and serum SHBG, stratified by sex., Participants: Healthy men (n = 34) and women (n = 21) were combined from two cross-sectional studies. Forty-two per cent of participants had hepatic steatosis, and the majority were overweight (62%) or obese (27%)., Results: DNL was inversely associated with SHBG in women (β: -0.015, 95% CI: -0.030; 0.000), but not in men (β: 0.007, 95% CI: -0.005; 0.019) (p for interaction = .068). Adjustment for study population, age and body mass index did not materially change these results, although statistical significance was lost after adjustment for serum insulin., Conclusions: An inverse association between DNL and SHBG may explain the decreased SHBG levels that are observed in obesity, at least in women., (© 2021 The Authors. Clinical Endocrinology published by John Wiley & Sons Ltd.)
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- 2021
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29. The relationships of sex hormone-binding globulin, total testosterone, androstenedione and free testosterone with metabolic and reproductive features of polycystic ovary syndrome.
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Simons PIHG, Valkenburg O, Bons JAP, Stehouwer CDA, and Brouwers MCGJ
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- Cross-Sectional Studies, Female, Humans, Sex Hormone-Binding Globulin analysis, Sex Hormone-Binding Globulin metabolism, Testosterone, Androstenedione, Polycystic Ovary Syndrome complications, Polycystic Ovary Syndrome pathology
- Abstract
Objective: A recent Mendelian randomization study has suggested a causal role for sex hormone-binding globulin (SHBG), total testosterone and free testosterone in the pathogenesis of polycystic ovary syndrome (PCOS). The aim of this study was to assess the relationships of SHBG, androstenedione, total and free testosterone with the individual metabolic and reproductive features of PCOS., Design: Cross-sectional data in PCOS patients (n=96) prospectively collected in a secondary/tertiary clinic for menstrual cycle disorders., Methods: Multivariable regression analyses were conducted to study the associations between SHBG, androstenedione, total and free testosterone with metabolic (BMI, waist circumference, systolic and diastolic blood pressure, total cholesterol, LDL cholesterol, HDL cholesterol, triglycerides and homeostatic model assessment for insulin resistance [HOMA2-IR]) and reproductive features (menstrual cycle length, antral follicle count, anti-Müllerian hormone, luteinizing hormone, follicle-stimulating hormone and Ferriman-Gallwey score) of PCOS., Results: Serum SHBG and free testosterone, but not total testosterone or androstenedione, were significantly associated with BMI, waist circumference, serum triglycerides, HDL cholesterol, LDL cholesterol and HOMA2-IR. The strength of the associations with serum lipids was reduced after adjustment for BMI, but not for HOMA2-IR. Total testosterone was significantly associated with antral follicle count. SHBG, total testosterone and androstenedione were significantly associated with serum AMH. Only the strength of the association for SHBG was reduced after adjustment for BMI., Conclusions: Serum SHBG is associated with primarily metabolic features, whereas total testosterone and androstenedione are associated with reproductive features of PCOS. These results suggest a differential underlying pathophysiology for the metabolic and reproductive features of PCOS., Competing Interests: The authors declare that there is no conflict of interest., (© 2021 The Authors. Endocrinology, Diabetes & Metabolism published by John Wiley & Sons Ltd.)
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- 2021
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30. The FOAM study: is Hysterosalpingo foam sonography (HyFoSy) a cost-effective alternative for hysterosalpingography (HSG) in assessing tubal patency in subfertile women? Study protocol for a randomized controlled trial.
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van Rijswijk J, van Welie N, Dreyer K, van Hooff MHA, de Bruin JP, Verhoeve HR, Mol F, Kleiman-Broeze KA, Traas MAF, Muijsers GJJM, Manger AP, Gianotten J, de Koning CH, Koning AMH, Bayram N, van der Ham DP, Vrouenraets FPJM, Kalafusova M, van de Laar BIG, Kaijser J, van Oostwaard MF, Meijer WJ, Broekmans FJM, Valkenburg O, van der Voet LF, van Disseldorp J, Lambers MJ, Peters HE, Lier MCI, Lambalk CB, van Wely M, Bossuyt PMM, Stoker J, van der Veen F, Mol BWJ, and Mijatovic V
- Subjects
- Abortion, Spontaneous etiology, Adolescent, Adult, Fallopian Tube Diseases complications, Female, Humans, Infertility, Female etiology, Laparoscopy adverse effects, Live Birth, Ovulation Induction, Pain, Procedural etiology, Pregnancy, Pregnancy Rate, Reproductive Techniques, Assisted, Research Design, Ultrasonography adverse effects, Ultrasonography economics, Young Adult, Fallopian Tube Diseases diagnostic imaging, Fallopian Tubes diagnostic imaging, Hysterosalpingography adverse effects, Hysterosalpingography economics, Infertility, Female diagnostic imaging, Infertility, Female therapy, Multicenter Studies as Topic, Randomized Controlled Trials as Topic, Ultrasonography methods
- Abstract
Background: Tubal pathology is a causative factor in 20% of subfertile couples. Traditionally, tubal testing during fertility work-up is performed by hysterosalpingography (HSG). Hysterosalpingo-foam sonography (HyFoSy) is a new technique that is thought to have comparable accuracy as HSG, while it is less expensive and more patient friendly. HyFoSy would be an acceptable alternative for HSG, provided it has similar effectiveness in terms of patient outcomes., Methods/design: We aim to compare the effectiveness and costs of management guided by HyFoSy or by HSG. Consenting women will undergo tubal testing by both HyFoSy and HSG in a randomized order during fertility work-up. The study group will consist of 1163 subfertile women between 18 and 41 years old who are scheduled for tubal patency testing during their fertility work-up. Women with anovulatory cycles not responding to ovulation induction, endometriosis, severe male subfertility or a known contrast (iodine) allergy will be excluded. We anticipate that 7 % (N = 82) of the participants will have discordant test results for HyFoSy and HSG. These participants will be randomly allocated to either a management strategy based on HyFoSy or a management strategy based on HSG, resulting in either a diagnostic laparoscopy with chromopertubation or a strategy that assumes tubal patency (intrauterine insemination or expectant management). The primary outcome is ongoing pregnancy leading to live birth within 12 months after randomization. Secondary outcomes are patient pain scores, time to pregnancy, clinical pregnancy, miscarriage rate, multiple pregnancy rate, preterm birth rate and number of additional treatments. Costs will be estimated by counting resource use and calculating unit prices., Discussion: This trial will compare the effectiveness and costs of HyFoSy versus HSG in assessing tubal patency in subfertile women., Trial Registration: Dutch Trial Register (NTR 4746, http://www.trialregister.nl ). Date of registration: 19 August 2014.
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- 2018
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31. Follicle-stimulating hormone receptor polymorphism affects the outcome of ovulation induction in normogonadotropic (World Health Organization class 2) anovulatory subfertility.
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Valkenburg O, van Santbrink EJ, König TE, Themmen AP, Uitterlinden AG, Fauser BC, Lambalk CB, and Laven JS
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- Adult, Anovulation classification, Clomiphene therapeutic use, Drug Resistance genetics, Female, Fertility Agents, Female therapeutic use, Humans, Infertility, Female classification, Polycystic Ovary Syndrome genetics, Polycystic Ovary Syndrome therapy, Pregnancy, Retrospective Studies, Treatment Outcome, World Health Organization, Young Adult, Anovulation genetics, Anovulation therapy, Infertility, Female genetics, Infertility, Female therapy, Ovulation Induction, Polymorphism, Single Nucleotide, Receptors, FSH genetics
- Abstract
Objective: To assess whether an FSH receptor polymorphism (Asn680Ser, rs6166) can affect the outcome of ovulation induction in normogonadotropic (World Health Organization class 2 [WHO2]) anovulatory subfertile women., Design: Prospective, longitudinal, cohort study., Setting: University-based fertility unit., Patient(s): A total of 240 consecutive women diagnosed with WHO2 anovulatory subfertility who underwent ovulation induction therapy. Results were replicated in a retrospective cohort of 185 patients with polycystic ovary syndrome (PCOS) (Rotterdam criteria)., Intervention(s): Ovulation induction using clomiphene citrate (CC) as first-line and exogenous gonadotropins (exFSH) as second-line therapy., Main Outcome Measure(s): Clomiphene-resistant anovulation (CRA), clomiphene failure (CCF), and ongoing pregnancy rate., Result(s): Genotyped patients (n = 159) were similar to nongenotyped women (n = 81) regarding clinical characteristics and outcomes of ovulation induction. The 680(Ser) allele was associated with CRA. A pooled analysis of both cohorts showed an 89% higher chance of CRA after CC treatment (odds ratio 1.9 [95% confidence interval 1.1-3.3]) in homozygous carriers of the FSH receptor variant (680(Ser/Ser)). A lower chance of ongoing pregnancy (hazard ratio 0.51 [95% confidence interval 0.27-0.98]) was observed among these patients during CC treatment in the prospective cohort., Conclusion(s): An FSH receptor polymorphism is associated with CRA during treatment with clomiphene citrate. These data may be used to design a treatment algorithm that is more efficacious and better tailored to the individual patient., (Copyright © 2015 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.)
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- 2015
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32. The role of anti-Müllerian hormone in the classification of anovulatory infertility.
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Lie Fong S, Schipper I, Valkenburg O, de Jong FH, Visser JA, and Laven JS
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- Adolescent, Adult, Case-Control Studies, Estradiol blood, Female, Gonadotropins blood, Humans, Young Adult, Anovulation blood, Anovulation classification, Anti-Mullerian Hormone blood, Infertility, Female blood, Infertility, Female classification
- Abstract
Objective: The World Health Organization (WHO) has defined three classes of anovulatory infertility, based on serum gonadotrophin and oestradiol levels: low gonadotrophin and oestradiol levels in women with WHO 1 anovulation, normal hormone levels in WHO 2 anovulation and high gonadotrophin but low oestradiol levels in WHO 3 anovulation. The number of follicles on the ovary also seems to be different in the three classes of anovulatory infertility. Serum anti-Müllerian hormone (AMH) levels correlate well with the number of pre-antral and small antral follicles. The objective of our study was to investigate whether a single AMH measurement might simplify the classification of the WHO classes of anovulatory dysfunction., Study Design: In a tertiary hospital, 1863 patients with either oligomenorrhea or secondary amenorrhea were recruited. Standardized screening was performed, including transvaginal ultrasound and serum AMH measurement. Serum AMH levels were compared with those in 348 age-matched controls., Results: Serum AMH levels were slightly elevated in women with hypogonadotropic anovulation (n=128) (P<0.001) as compared with controls. Normogonadotropic anovulatory women (n=1.465) had distinctly higher serum AMH levels than controls (P<0.001) and serum AMH levels were low in women with hypergonadotropic anovulation (n=270) (P<0.001). Although median AMH levels were distinctly different in each class of anovulatory dysfunction, serum AMH levels were comparable in hypogonadotropic women and normogonadotropic women without polycystic ovary syndrome., Conclusion: The clinical applicability of serum AMH as a diagnostic tool to differentiate between the different classes of anovulatory dysfunction seems to be limited to the prediction of hypergonadotropic anovulation., (Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.)
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- 2015
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33. The phenotype of polycystic ovary syndrome ameliorates with aging.
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Brown ZA, Louwers YV, Fong SL, Valkenburg O, Birnie E, de Jong FH, Fauser BC, and Laven JS
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- Adult, Age Factors, Androstenedione blood, Biomarkers blood, Blood Glucose metabolism, Chi-Square Distribution, Dehydroepiandrosterone Sulfate blood, Female, Follow-Up Studies, Humans, Insulin blood, Insulin Resistance, Menstrual Cycle, Netherlands, Ovary physiopathology, Phenotype, Retrospective Studies, Testosterone blood, Young Adult, Aging, Polycystic Ovary Syndrome blood, Polycystic Ovary Syndrome diagnosis, Polycystic Ovary Syndrome physiopathology
- Abstract
Objective: To assess the effects of aging on the features of polycystic ovary syndrome (PCOS)., Design: Retrospective longitudinal follow-up study., Setting: Tertiary care center., Patient(s): Patients with PCOS, diagnosed according to the 2003 Rotterdam criteria, who visited the outpatient clinic on consecutive occasions with a minimum interval of 6 months., Intervention(s): Comparisons were made between the first visit and the consecutive visit grouped by intervals., Main Outcome Measure(s): Changes in clinical and endocrine characteristics., Result(s): A total of 254 women visited the outpatient clinic on 2 occasions each. Consecutive visits were grouped into 0.5 to 3.9 years (n = 172; mean follow-up, 2.6 years) and 4.0 to 7.0 years (n = 82; mean follow-up, 5.5 years). At their second visit, significantly more women had regained a regular cycle. The total antral follicle count was similar. Serum levels of testosterone, androstenedione, and dehydroepiandrosterone sulfate had decreased significantly. Plasma glucose levels had increased, whereas serum insulin levels and homeostasis model assessment score had significantly decreased., Conclusion(s): The PCOS phenotype changed with aging, suggesting an amelioration of the phenotype and ovarian dysfunction as indicated by the increase in number of regular menstrual cycles, decrease in serum androgen levels, and decrease in insulin resistance., (Copyright © 2011 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.)
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- 2011
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34. Oligoovulatory and anovulatory cycles in women with polycystic ovary syndrome (PCOS): what's the difference?
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Burgers JA, Fong SL, Louwers YV, Valkenburg O, de Jong FH, Fauser BC, and Laven JS
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- Adolescent, Adult, Amenorrhea physiopathology, Androgens blood, Anovulation blood, Anovulation drug therapy, Anovulation genetics, Clomiphene therapeutic use, Cohort Studies, Female, Fertility Agents, Female therapeutic use, Follicle Stimulating Hormone therapeutic use, Humans, Menstrual Cycle physiology, Ovulation Induction methods, Phenotype, Polycystic Ovary Syndrome complications, Polycystic Ovary Syndrome drug therapy, Polycystic Ovary Syndrome genetics, Pregnancy, Recombinant Proteins therapeutic use, Retrospective Studies, Anovulation physiopathology, Ovulation Inhibition physiology, Polycystic Ovary Syndrome physiopathology
- Abstract
Context: Polycystic ovary syndrome (PCOS) is a heterogeneous disorder. The phenotype may differ between patients who exhibit signs of recent ovulation and anovulatory PCOS patients., Objective: Our objective was to study differences in clinical and endocrine characteristics and response to ovulation induction (OI) treatment comparing oligoovulatory and anovulatory PCOS patients., Design and Setting: We conducted a retrospective cohort study at a tertiary hospital., Patients: PCOS patients (n=1750) presenting with oligo- or amenorrhea were diagnosed according to the Rotterdam 2003 consensus criteria. Arbitrarily, oligoovulatory PCOS was defined by a single random serum progesterone level of 10 nmol/liter or higher., Main Outcome Measures: We evaluated the incidence of oligo- or amenorrhea, menstrual cycle length, serum androgen levels, follicle count, and OI outcome parameters., Results: Anovulatory women (n=1541 of 1750, 88.1%) were more often amenorrheic (P<0.001) and presented with a longer cycle duration (P<0.001) compared with oligoovulatory women (n=209 of 1750, 11.9%). Serum levels of testosterone (P<0.001), the free androgen index (P<0.001), and total follicle count (P<0.005) were higher in anovulatory compared with oligoovulatory patients. During clomiphene citrate OI, more oligoovulatory women gained regular menstrual cycles (P<0.05), whereas after second-line treatment with recombinant FSH, more anovulatory women became pregnant (P<0.05)., Conclusions: Oligoovulatory women with PCOS exhibit a milder phenotype of ovarian dysfunction and have a more favorable response to OI treatment using clomiphene citrate compared with anovulatory PCOS patients. However, during second-line treatment with recombinant FSH, anovulatory PCOS patients presented with a higher chance of pregnancy compared with oligoovulatory patients.
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- 2010
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35. Variants in the ACVR1 gene are associated with AMH levels in women with polycystic ovary syndrome.
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Kevenaar ME, Themmen AP, van Kerkwijk AJ, Valkenburg O, Uitterlinden AG, de Jong FH, Laven JS, and Visser JA
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- Activin Receptors, Type I physiology, Adolescent, Adult, Aged, Aged, 80 and over, Anti-Mullerian Hormone genetics, Cohort Studies, Female, Gene Frequency, Haplotypes, Humans, Linkage Disequilibrium, Middle Aged, Ovarian Follicle metabolism, Ovarian Follicle physiology, Risk Factors, Signal Transduction, Activin Receptors, Type I genetics, Anti-Mullerian Hormone metabolism, Polycystic Ovary Syndrome genetics, Polymorphism, Single Nucleotide
- Abstract
Background: Polycystic ovaries display an increased number of pre-antral and antral follicles compared with normal ovaries, suggesting that early and late follicle development are disturbed. The pathophysiology of this process is poorly understood. Since the transforming growth factor beta family members, anti-Müllerian hormone (AMH) and bone morphogenetic proteins (BMPs), inhibit FSH sensitivity, their signalling may contribute to the aberrant follicle development in these women. Here, we investigated the role of ALK2, a type I receptor for AMH/BMP signalling, in PCOS using a genetic approach., Methods: Seven single nucleotide polymorphisms in the ACVR1 gene, encoding ALK2, were genotyped in 359 PCOS patients and 30 normo-ovulatory and 3543 population-based control women, and haplotypes were determined. Subsequently, the association of ACVR1 variants with ovarian parameters and hormone levels was investigated., Results: The polymorphisms rs1220134, rs10497189 and rs2033962 and their corresponding haplotypes did not show different frequencies from controls, but were associated with AMH levels in PCOS women (P = 0.001, P = 0.002 and P = 0.007, respectively). Adjustment for follicle number revealed that the association with AMH levels was, in part, independent from follicle number, suggesting that variants in ACVR1 also influence AMH production per follicle., Conclusions: Genetic variation within ACVR1 is associated with AMH levels and follicle number in PCOS women, suggesting that ALK2 signalling contributes to the disturbed folliculogenesis in PCOS patients.
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- 2009
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36. Lipid profile of women with premature ovarian failure.
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Knauff EA, Westerveld HE, Goverde AJ, Eijkemans MJ, Valkenburg O, van Santbrink EJ, Fauser BC, and van der Schouw YT
- Subjects
- Adult, Case-Control Studies, Cholesterol, HDL blood, Cholesterol, LDL blood, Estrogens blood, Female, Gonadal Steroid Hormones blood, Humans, Netherlands, Reference Values, Risk Factors, Triglycerides blood, Androgens blood, Lipids blood, Menopause, Premature blood, Primary Ovarian Insufficiency blood, Women's Health
- Abstract
Objective: Earlier menopause is associated with a higher incidence of cardiovascular events later in life. Concurrent with the ages of menopausal transition, a shift in lipid profile takes place. Premature ovarian failure (POF) or premature menopause allows us to study the effect of cessation of ovarian function on the lipid profile independent of effects of advanced chronological age., Design: Fasting triglycerides (TGs), total high-density lipoprotein (HDL), and low-density lipoprotein cholesterol levels were measured in 90 women with POF not using any hormone therapy and 198 population controls of the same age range not using oral contraceptives. Correlations between lipids and ovarian function parameters were assessed., Results: : After correction for age, body mass index, and smoking, women with POF presented with significantly higher TG levels (mean difference: 0.17 log mmol/L [95% CI: 0.06-0.29]). HDL cholesterol levels were borderline significantly lower in women with POF. No age-corrected correlation between triglycerides or other lipids and estradiol levels or time of estrogen deprivation could be identified. However, the free androgen index, sex hormone-binding globulin, and testosterone concentrations showed significant correlations with TGs and/or HDL cholesterol concentrations., Conclusions: Loss of ovarian function at a very young age (POF) coincides with subtle changes in the lipid profile (higher TG levels and marginally lower HDL). Androgens (increased free androgen index and testosterone and decreased sex hormone-binding globulin) are better markers for unfavorable lipid changes compared with estrogen levels or duration of estrogen deprivation in women with POF. Elevated TG levels in combination with increased (free) androgens may be an early manifestation of reduced insulin sensitivity.
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- 2008
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37. A more atherogenic serum lipoprotein profile is present in women with polycystic ovary syndrome: a case-control study.
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Valkenburg O, Steegers-Theunissen RP, Smedts HP, Dallinga-Thie GM, Fauser BC, Westerveld EH, and Laven JS
- Subjects
- Adult, Case-Control Studies, Cohort Studies, Female, Humans, Hyperandrogenism metabolism, Insulin Resistance physiology, Multivariate Analysis, Obesity blood, Risk Factors, Apolipoprotein A-I blood, Apolipoproteins B blood, Atherosclerosis blood, Cholesterol blood, Insulin blood, Polycystic Ovary Syndrome blood, Triglycerides blood
- Abstract
Context: Polycystic ovary syndrome (PCOS) is associated with a higher frequency of cardiovascular risk factors. Apolipoprotein (apo) A-I and apoB are potent markers for cardiovascular risk. Data on apo levels in women with PCOS are scarce and contradictory., Objective: Our objective was to identify changes in lipid metabolism in women with PCOS, and the relative impact of obesity, insulin resistance, and hyperandrogenism on lipid parameters., Design: This was a case-control study., Setting: The study was performed at a single referral center., Subjects: PCOS was diagnosed according to the 2003 Rotterdam criteria. Healthy mothers with regular menstrual cycles served as controls., Main Outcome Parameters: Fasting insulin, triglycerides (TGs), cholesterol, high-density lipoprotein (HDL)-cholesterol, apoA-I, and apoB were determined. Low-density lipoprotein (LDL)-cholesterol was calculated using the Friedewald formula., Results: We included 557 women with PCOS and 295 controls. After correction for age and body mass index, PCOS women had higher median levels of insulin (10.1 vs. 6.9 mU/liter), TGs (95 vs. 81 mg/dl), cholesterol (196 vs. 178 mg/dl), and LDL-cholesterol (125 vs. 106 mg/dl) in combination with lower levels of HDL-cholesterol (46 vs. 55 mg/dl) and apoA-I (118 vs. 146 mg/dl) compared with controls (all P values < or = 0.01). apoB levels were similar in cases and controls. Free androgen index, body mass index, SHBG, and estradiol were independent predictors of apoA-I levels in women with PCOS., Conclusions: PCOS is associated with a more pronounced atherogenic lipid profile. Furthermore, obesity and hyperandrogenism contribute to an adverse lipid profile. Finally, PCOS seems to constitute an additional risk factor for an atherogenic lipid profile.
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- 2008
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38. PCOS according to the Rotterdam consensus criteria: Change in prevalence among WHO-II anovulation and association with metabolic factors.
- Author
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Broekmans FJ, Knauff EA, Valkenburg O, Laven JS, Eijkemans MJ, and Fauser BC
- Subjects
- Anovulation diagnosis, Cohort Studies, Consensus, Female, Humans, Hyperglycemia diagnosis, Hyperglycemia epidemiology, Insulin Resistance, Netherlands epidemiology, Obesity complications, Polycystic Ovary Syndrome diagnosis, Prevalence, Risk Factors, Anovulation epidemiology, Obesity epidemiology, Polycystic Ovary Syndrome epidemiology
- Abstract
Objective: The current report aims to compare the prevalence of polycystic ovary syndrome (PCOS) diagnosed according to the new Rotterdam criteria (Rott-PCOS) versus the previous criteria as formulated by the National Institutes of Health (NIH) (NIH-PCOS) in women with normogonadotropic (WHO-II) anovulation and assess the frequency of obesity and related factors determined in these women., Design: Cohort study based on large anovulation screening database., Setting: Two large tertiary referral centres for reproductive medicine., Population: WHO-II normogonadotropic, anovulatory, infertility cases., Methods: WHO-II cases were extracted from the screening database and classified according to both the Rotterdam and NIH criteria for PCOS. Within these two classes, the prevalence of obesity, hyperglycaemia and insulin resistance was assessed and compared and their relation to the difference in diagnostic criteria applied was analysed., Main Outcome Measures: Prevalence of diagnosis PCOS in the WHO-II anovulation group. Prevalence of obesity, hyperglycaemia and insulin resistance in the two diagnostic classes., Results: The Rott-PCOS group appeared to be more than 1.5 times larger than the group classified as NIH-PCOS (91 versus 55% of the WHO-II cohort). Especially, women with ovarian dysfunction and polycystic ovaries at ultrasound scan, but without hyperandrogenism, were added to the PCOS diagnostic group. The Rott-PCOS exhibited a lower frequency of obesity, hyperglycaemia and insulin resistance compared with the NIH-PCOS group. Obese women in the Rott-PCOS group without androgen excess had a different metabolic profile compared with obese women in the NIH-PCOS group, with lower rates of hyperglycaemia and hyperinsulinism, despite comparable distributions of body weight., Conclusion: The present findings indicate that with the new Rotterdam consensus criteria, oligo/anovulatory women with less severe metabolic derangement will be added to the heterogeneous group of women with PCOS.
- Published
- 2006
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