Basic information description The placenta (also called the afterbirth) separates from the uterine wall. The placenta carries all nutrients and oxygen to the fetus. A separation can cause complications for the mother and the fetus. With a small separation, there may be no or few symptoms. Larger separations usually cause symptoms. frequent signs and symptoms Bleeding may be external (vaginal bleeding) or it may be concealed (bleeding remains in the uterus). Mild pain or discomfort, or...