Post-transplant ectopic pregnancy is a pregnancy that does not form in the body cavity of the uterus after the IVF transplant. The diagnosis is usually clear based on the symptoms of the pregnant woman and clinical examination. If symptoms of menopause, delayed menstruation, abdominal pain, small amount of vaginal bleeding, nausea, vomiting, weakness and dizziness occur after transplantation, the presence of ectopic pregnancy should be considered; the diagnosis can also be confirmed by relevant tests, such as blood test for HCG 1 week after transplantation, or ultrasound for gestational sac 4-5 weeks after transplantation.