There are many causes of vaginal bleeding in pregnancy. Some result in bleeding early in pregnancy, while others result in bleeding later.

Usually, slight bleeding will stop on its own. Sometimes bleeding may become serious and pose a risk to mother and fetus.

Many pregnant women have vaginal spotting or bleeding in the first 12 weeks of pregnancy. If there is vaginal bleeding early in pregnancy, a doctor will perform a pelvic exam. A blood test may be done to measure human chorionic gonadotropin...