Effects of M II stage oocytes zona pellucida birefringence on pregnancy outcome.

OBJECTIVE To explore the effects of different M II stage oocytes zona pellucida birefringence on pregnancy outcome. METHODS A total of 46 couples with infertile which induced by single cause received in-vitro fertilization treatment were analyzed retrospectively, and randomly divided into the high zona birefringence (HZB)/HZB group, HZB/low zona… CONTINUE READING