If there is no rejection after the transfer into the uterus, the blastocyst will survive and develop, and if it develops normally, it will stay in the uterus for about 280 days until delivery. In case of rejection, the blastocyst will not survive for an undetermined period of time, which may be a day or a few days. After all, the success rate of IVF is low, only around 30%. It can be affected by many things, such as sperm, egg quality, uterine environment, physical quality, etc. IVF is divided into embryo blastocysts and fresh matches. Blastocysts can start to lay on the same day of transfer after implantation into the woman’s body and will secrete human chorionic gonadotropin after successful laying. If the blastocyst transfer fails, a 2nd transfer will be required after 2 months. During this period, it is important to adjust the body and eat more nutritious food to strengthen the body, which can also improve the success rate of blastocyst.