Symptoms of third trimester preeclampsia are usually vaginal bleeding and abdominal pain. Third trimester preeclampsia may have symptoms of vaginal bleeding, which may be bloody leukorrhea, pink discharge, coffee-colored or brown discharge, and the manifestation of vaginal bleeding with preeclampsia may be different for each woman’s body. Third trimester preeclampsia miscarriage, some pregnant women may have symptoms of abdominal pain, this is due to uterine contractions caused by pain, may be paroxysmal lower abdominal pain, not all patients will have abdominal pain manifestation, some pregnant women simply vaginal bleeding. Third trimester pregnancy occurs with preeclampsia, to go to the hospital to check the intrauterine development of the fetus, the embryo is well developed to consider the treatment of fertility preservation, the embryo is not well developed may develop into a difficult to avoid miscarriage, and should be dealt with in a timely manner.