On the fourth day of blastocyst transfer, there is no feeling in most cases, and some women may experience occasional tingling sensation in the small abdomen. If the transfer is successful, about one week after the transfer, the blood test for HCG and progesterone will be elevated, and the secretion of human chorionic gonadotropin in large amounts will cause pregnancy reactions with symptoms such as nausea, vomiting, decreased appetite, drowsiness, and mental depression. Blastocyst transfer is the period when blastocyst fluid, blastocyst cavity, and blastocyst are produced inside the embryo and all cells have not started to differentiate, and this period of transfer can improve the success rate of implantation. After blastocyst transfer, it is recommended to pay attention to rest, preferably bed rest, avoid strenuous exercise, try to avoid viral infection and ionizing radiation, and eat reasonably.