Brown discharge after 35 days of IVF transplantation may be the case of pre-eclampsia, embryonic arrest, etc., which needs to be analyzed specifically. 1. Pre-eclampsia: When IVF embryo transfer is carried out, if the chromosomal development of the fetus is abnormal, or when the pregnant woman suffers from infection and other factors affecting the development of the fetus, it may lead to unstable development of the fetus in the uterus, which manifests itself as bleeding, thus resulting in brown secretion. 2. Embryonic arrest: when the development of the fetus stops, the pregnancy tissue will be shed, manifesting the symptom of bleeding, and if the bleeding is small, brown secretion will also exist. If the discharge is brown after IVF, it is recommended to go to the hospital in time and take standardized methods under the doctor’s guidance to prevent accidents.