[Analysis of pregnancy outcomes of polycystic ovary syndrome patients after frozen embryo transfer].

To investigate pregnancy outcomes of the patients with polycystic ovary syndrome (PCOS) after frozen embryo transfer (FET) . Data of 2 367 PCOS patients received in vitro fertilization-embryo transfer [including fresh embryo transfer (fET) and FET] from January 2009 to December 2015 in Peking University Third Hospital were evaluated retrospectively. The basal characteristics, pregnancy complications and outcomes were analyzed, then identified the relative factors followed. Totally 2 367 patients received in vitro fertilization-embryo transfer: 1 106 were treated with fET, and the rest 1 261 cases were treated with FET. The incidence of gestational diabetes mellitus (GDM) was lower in FET group [4.04%(51/1 261) versus 6.15%(68/1 106)], the difference was statistically significant (0.05). Singletons born after FET had higher birth weight than fET [(3 406±548) versus (3 360±533) g], the difference was statistically significant (0.05). There was no difference of other pregnancy complications between the two groups (all 0.05). fET was an independent risk factor for GDM (adjusted 1.570, 95% 1.075-2.294). Compared with fET, FET could decrease the risk of GDM and receive better neonatal outcomes in patients with PCOS.