The failure of the transfer, if it refers to blastocyst transfer, is usually around day 10-14, but there can be individual variations. Blastocyst transfer refers to In Vitro Fertilization-Embryo Transfer (IVF-ET) technique, an assisted reproductive technology that needs to be performed by a specialized physician, and is indicated for people with unexplained infertility, endometriosis, and other infertility that has not been effectively treated with conventional treatments. Generally around the 10th-14th day of blastocyst transfer, when symptoms such as abdominal pain, small amount of vaginal bleeding, or blood HCG does not show a significant rise, it may indicate that the transfer has failed and you need to go to the hospital. After embryo transfer must pay attention to appropriate rest, avoid strenuous exercise and exertion, prohibit coitus, continue to follow the doctor’s instructions to give luteal support, generally about 10-14 days after the transfer of blood HCG (human chorionic gonadotropin) levels to determine the pregnancy, when there is abdominal pain and vaginal bleeding after the transfer of the need to carry out the blood HCG test to find out whether the transfer is successful.