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Introduction: The present study aimed first to investigate the change in prevalence of major levator ani muscle (LAM) defects, also called avulsions, from 6 weeks to 1 year postpartum, and second to assess maternal and obstetric risk factors for having persistent major LAM defects/avulsions at 1 year postpartum. Material and methods: This is a secondary analysis of data from a prospective cohort study including 300 nulliparous women at 17-19 weeks of gestation. Major LAM defects were diagnosed at 6 weeks and 1 year postpartum using transperineal ultrasonography. We defined persistent major LAM defects as a defect diagnosed both at 6 weeks and 1 year postpartum. Maternal and obstetric data were obtained from the hospital's electronic birth records. Pelvic floor muscle function was measured vaginally by manometer at 21 weeks of gestation. The main outcome measurement was change in prevalence of major LAM defects. Maternal and obstetric risk factors for having persistent major LAM defect were also assessed. Results: Prevalence of major LAM defects was 19.4% at 6 weeks and 10.4% at 1 year postpartum. No new major LAM defects were diagnosed at 1 year postpartum. Persisting major LAM defects were associated with longer second stage of labor (median 74.5 minutes vs median 48.0 minutes, P = .012) and higher neonatal birthweight (mean difference of 232.3 g, 95% confidence interval [CI] 21.5-443.1). Vacuum delivery was independently associated with persistent major LAM defects, adjusted OR 3.0 (95% CI 1.0-9.0). Conclusions: There was a 50% reduction of sonographically diagnosed major LAM defects from 6 weeks to 1 year postpartum. This finding suggests that assessment of the major LAM 6 weeks postpartum may be too early to diagnose defects/avulsions. Long second stage of labor, high neonatal birthweight and vacuum delivery were associated with persistent major LAM defects/avulsions. Funding provided by the South-Eastern Norway Regional Health Authority.

Introduction and hypothesis: There is limited knowledge on dyspareunia during pregnancy and postpartum and the role of the pelvic floor muscles (PFM) in women with dyspareunia. Aims of the study were to investigate the presence of dyspareunia before and during pregnancy and postpartum, and to compare vaginal resting pressure (VRP), PFM strength, and endurance between women with and those without dyspareunia. It was hypothesized that there is no difference in PFM variables between women with and those without dyspareunia. Methods: Three hundred nulliparous women participated in this prospective cohort and answered questions about dyspareunia and the level of bother at gestational weeks 22 and 37, 6 and 12 months postpartum, and retrospectively prior to their pregnancies using ICIQ-FLUTSsex. PFM variables were assessed by manometer at gestational week 22, and 6 and 12 months postpartum. Comparisons between groups were analyzed using independent samples t test. Results: Twenty-eight and 30 % of the women reported dyspareunia at pre-pregnancy and at gestational week 22 respectively. At gestational week 37, and 6 and 12 months postpartum, the percentages were 40, 45, and 33 respectively. No difference in PFM variables was found between women with and those without dyspareunia. Level of bother was higher postpartum than before and during pregnancy. Conclusions: Symptoms of dyspareunia were common at all time points. No link could be made between PFM function and dyspareunia. Women suffering from dyspareunia postpartum reported it as being bothersome. Our findings suggest that women should be asked about symptoms of dyspareunia related to pregnancy, and that future research should aim for preventative and therapeutic strategies.

Introduction and hypothesis: The aim was to compare constriction of the levator hiatus (LH) and reduction of pelvic floor muscle (PFM) length during instruction of the Paula method (contraction of ring musculature of the mouth) and contraction of the PFM. Methods: Seventeen pregnant or postpartum women, mean age 28.6 (range 20–35) participated. A Voluson E8 ultrasound machine with 4–8 MHz curved array 3D/4D transducer (RAB 4-7l/obstetric) was used. Measurements were performed in the axial plane of minimal hiatal dimensions. Muscle length was calculated as circumference of the LH minus the suprapubic arch. Differences between groups were analyzed using Wilcoxon signed rank test. Significance level was set to 0.05. Results: There was a significant reduction of the LH area (p< 0.001) and muscle length (p