Burning in the lower abdomen on the eighth day of frozen embryo transfer may be caused by the implantation of the embryo. Frozen embryo transfer is also a kind of in vitro fertilization-embryo transfer technique, which needs to be operated by professional doctors, and usually starts to implant around 4~5 days after the transfer, and the implantation may cause burning sensation in the lower abdomen, which is a normal physiological phenomenon. For this situation pregnant women should face with the right mindset, do not be overly nervous. After embryo transfer, it is necessary to pay attention to relaxation, maintain a relaxed and happy mood, avoid exertion and strenuous exercise, prohibit coitus, generally about 2 weeks after the transfer of blood or urine HCG test to determine pregnancy, about 4 weeks after the transfer of ultrasound examination to confirm intrauterine pregnancy. Luteal support therapy is the basis for the successful development of embryos after the transfer, and the medication should be used reasonably as prescribed by the doctor. Women should go to the hospital in case of abnormalities such as abdominal pain and vaginal bleeding after frozen embryo transfer.