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BACKGROUND: The association between ABO blood groups and ovarian reserve in infertile patients has been a point of controversy. OBJECTIVES: The aim of this study was to assess the correlation of certain blood groups with ovarian reserve and response to treatment in patients undergoing infertility treatment. DESIGN: Retrospective medical record review. SETTING: Infertility clinic in the assisted reproductive technology (ART) unit at King Faisal Specialist Hospital and Research Center, Riyadh Saudi Arabia. PATIENTS AND METHODS: All patients under 40 years of age who attended the infertility clinic at a tertiary care centre in 2010 and underwent in vitro fertilization (IVF) treatment in 2010 and 2011 were divided into groups according to blood type, and clinical parameters were compared. MAIN OUTCOME MEASURE(S): The association between blood groups and ovarian reserve using day 3 luteinzing hormone (LH) and follicular stimulating hormone (FSH) levels, and antral follical count (AFC). RESULTS: In 424 patients who underwent 566 IVF cycles, age, LH, FSH and AFC were similar among the different blood groups (P=.9, .1, .5, respectively). With controlled ovarian stimulation, no difference was observed among the four groups in menopausal gonadotrophin (hMG) dose or the duration of stimulation. The number of oocytes retrieved, fertilization rate, cleavage rate, and number of embryos transferred were similar. There was no difference in the cancellation rate or pregnancy rate among the groups. CONCLUSION: There was no significant association between blood type and ovarian reserve or response during IVF treatment in our population. LIMITATIONS: Anti-Mullerian hormone levels are best correlated with ovarian reserve testing. Unavailability of AMH levels. Retrospective design.

To determine the risk factors predisposing to fetal macrosomia and assess the maternal and perinatal outcome in these patients.This was a retrospective analysis of all macrosomic deliveries in the Department of Obstetrics and Gynecology, Sultan Qaboos University Hospital, Sultanate of Oman, during a 3-year period from January 2001 -- December 2003. The maternal and neonatal records of infants with birth weight ofor =4000 g (n=275) were reviewed. Outcome variables included demographic profile, antenatal risk factors, mode of delivery and maternal and perinatal complications.A total of 7367 deliveries occurred during the study period. The rate of macrosomic deliveries was 3.75% and the rate of deliveriesor =4500 g was 0.48%. The mean birth weight of the study group was 4230 +/- 220 g. Obesity, diabetes, prolonged gestation and postpartum hemorrhage were significantly higher in the study group. The cesarean section rate was 25.8% for the study group compared to the general incidence of 13.1% during the study period (p0.0001). The incidence of shoulder dystocia was 7.6% compared to the general incidence of 0.48% during the study period (p0.0001). There were 7 cases of Erb's palsy, all except one recovered without sequelae by 3 months of age.Gestational diabetes, maternal obesity, increasing age and parity were the main risk factors for fetal macrosomia. The incidence of shoulder dystocia, birth injuries and neonatal morbidity increased in this group.