Marginal placenta previa may cause antepartum hemorrhage and postpartum hemorrhage in pregnancy. You should rest, abstain from coitus, and be punctual in your labor checkups, and sometimes the placenta can grow up on its own. Marginal placenta previa is a condition in which the placenta is attached to the lower part of the uterus and the lower edge of the placenta reaches, but does not go beyond, the inner cervical opening. Once this happens, you need to take bed rest, avoid strenuous activities and prohibit sexual intercourse. With the increase of pregnancy weeks, the placenta may automatically move up and is no longer borderline placenta previa, but it may not. In addition to good health care during pregnancy, pregnant women with marginal placenta previa need to undergo obstetric examination on time and use magnesium sulfate contraction inhibitor and other treatments if necessary. If abnormal symptoms such as vaginal bleeding occur, consult a doctor in time to complete the relevant examinations and standardized treatment.