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 the 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 and relevant tests can be performed to confirm the diagnosis. If the value of HCG is elevated and doubles the next day, the pregnancy is intrauterine. If the value is less elevated, there is a higher probability of ectopic pregnancy. If the gestational sac is not seen in the uterus, but an echogenic or strongly echogenic mass in the adnexal region is sometimes seen outside the uterus, the diagnosis of ectopic pregnancy can be confirmed by ultrasound 4-5 weeks after transplantation. How to treat post-transplant ectopic pregnancy Once post-transplant ectopic pregnancy is diagnosed, it needs to be treated actively, and the treatment methods are as follows: 1. surgical treatment: including removal of the affected fallopian tube and preservation of the affected fallopian tube, as well as conservative surgical treatment; 2. non-surgical treatment: including Chinese herbal medicine treatment, or application of chemical drugs such as methotrexate. In order to prevent ectopic pregnancy after transplantation, we should pay attention to the following aspects: 1. advance treatment of gynecological inflammation, such as tubal inflammation and pelvic inflammatory disease; 2. timely tubal imaging and tubal lavage examination; 3. close monitoring of those who have a history of tubal surgery, and trying to conceive under the guidance of a doctor if they have a pregnancy intention.