Outcomes of ovarian hyperstimulation and embryo culture
In comparison with the gIVF group, it was more frequently for women in the unLM and ceLM group to use long GnRH agonist or GnRH antagonist protocol, respectively, for ovarian hyperstimulation (61.91% vs. 68.56%, P=0.013; 16.02% vs. 25.00%, P=0.000; Table Ⅱ ). Consequently, more blastocysts were obtained in the above two groups (for unLM group, 4.36±2.95 vs. 4.93±3.14, P=0.001; for ceLM group, 4.36±2.95 vs. 5.07±3.14, P=0.000; Table Ⅱ ). In addition, the time interval between the occurrence of LM after first embryo transfer and the subsequent transfer were statistically less in the unLM subgroup than that in the feLM or ceLM subgroup (26.73±9.50 vs. 29.36±9.18/30.03±9.33,P=0.020; Table Ⅱ ).