For women with menstrual cycle around 28-30 days, the time of frozen embryo transfer is around day 14-16 of the menstrual cycle. The specific time of transfer needs to be based on the thickness of endometrium detected by ultrasound and ovulation, and the specific time of transfer varies with the length of menstrual cycle of each woman. Frozen embryo transfer requires the thickness of the endometrium to be around 8-13mm, and the transfer is performed after ovulation is over, the environment inside the organism is the same as normal conception, which is conducive to embryo implantation. Frozen embryo transfer into the uterus will slowly bury into the endometrium, and the process of implantation will be completed in about 7-10 days, and human chorionic gonadotropin will be secreted, and the pregnancy will be determined by testing the hormone level in the venous blood, and it is recommended not to exercise strenuously and rest more after the frozen embryo transfer.