[Study on clinical effect on infertility women with polycystic ovary syndrome treated by in vitro maturation and in vitro fertilization-embryo transfer].

OBJECTIVE

To compare clinical and laboratory outcomes of in vitro maturation (IVM) with in vitro fertilization-embryo transfer (IVF-ET) in treatment of infertility associated with polycystic ovary syndrome (PCOS).

METHODS

From Jan.2007 to Dec.2010, infertile patients with PCOS underwent 701 cycles in First Affiliated Hospital of Wenzhou Medical College were studied retrospectively. Those were divided into 293 cycles of IVM group and 408 cycles of IVF/intra-cytoplasmic sperm injection (ICSI) group. The average transplantation rate, mean number of retrieval oocytes, maturation rate, fertilization rate, cleavage rate, high quality embryo rate, embryo implantation rate, pregnancy rate per transfer, pregnancy outcomes and incidence of ovarian hyperstimulation syndrome (OHSS) of the two methods of treatment were compared between two groups.

RESULTS

There were 275 cycles in IVM group and 342 cycles in IVF/ICSI group established embryo transfer. The transplantation rate was 93.9% (275/293) in IVM group and 83.8% (342/408) in IVF/ICSI, which reached statistical difference (P < 0.01). The maturation rate of 56.64%, cleavage rate of 88.08%, high quality embryo rate of 38.72% and embryo implantation rate of 17.8% in IVM group were significantly lower than 91.09%, 94.91%, 51.50% and 25.4% in IVF/ICSI group (all P < 0.01). The clinical pregnancy rate per transfer were 37.8% (104/275) in IVM group and 44.2% (151/342) in IVF/ICSI group, which did not show statistical difference (P > 0.05). The mean number of oocytes (12.9 ± 6.5 vs. 12.9 ± 7.9) and fertilization rate (76.52% vs. 70.75%) didn't show significant difference between IVM group and IVF/ICSI group (P > 0.05). The 21.3% (87/408) cycles presented mild to moderate OHSS and 2.0% cycles (8/408) presented severe OHSS in IVF/ICSI group. While, no OHSS cycles were observed in IVM group.

CONCLUSION

IVM could get similar clinical pregnancy rates compared with IVF/ICSI in patient with PCOS, however, it can avoid occurrence of OHSS.