RESUMEN
OBJECTIVE: To assess the obstetric outcome of pregnancies resulting from in vitro maturation (IVM) and IVF-ET of immature oocytes retrieved from women with polycystic ovary syndrome (PCOS). DESIGN: Prospective observational study. SETTING: University fertility clinic. PATIENT(S): One hundred thirty-nine women undergoing 203 IVM treatment cycles. INTERVENTION(S): Immature oocyte recovery from unstimulated ovaries. In vitro oocyte maturation and fertilization. Fresh ET and assessment of obstetric outcomes in the pregnant women. MAIN OUTCOME MEASURE(S): Pregnancy and obstetric outcome. RESULT(S): Forty-one pregnancies were obtained in 187 ETs, resulting in a pregnancy rate of 21.9%. Except for three patients lost to follow-up in these pregnancies, the abortion and live birth rates were 36.8% (14 of 38) and 63.2% (24 of 38), respectively. The mean (+/-SD) gestational age and birth weight at delivery for singletons were 38.4 +/- 2.0 weeks (range, 33-41.6 weeks) and 3,252 +/- 516 g (1,750-4,100 g), respectively. For twins these were 36.7 +/- 1.9 weeks (34.6-39 weeks) and 2,361 +/- 304 g (1,900-2,990 g), respectively. Pregnancy complications occurred in five patients (13.2%); these included preterm labor (n = 3) and placenta previa (n = 2). Two patients (5.3%) had a major congenital anomaly diagnosed by ultrasonography. CONCLUSION(S): The abortion rate, gestational age and birth weight at delivery, and obstetric complications of pregnancies conceived by IVM-ET in women with PCOS were comparable with those of other women with PCOS being treated by conventional IVF-ET. In vitro maturation followed by IVF-ET seems to be a useful treatment option for women with PCOS, thus avoiding the risk of ovarian hyperstimulation syndrome.
