1. What is early pregnancy miscarriage? Early pregnancy miscarriage is the death and expulsion of an embryo or fetus during the first 12 weeks of pregnancy. It usually occurs early in pregnancy, and many times a woman may not know she is pregnant. The cause of miscarriage may be abnormal embryonic development or maternal disease. 2. What are the symptoms of miscarriage in early pregnancy? 1. Abdominal pain: One of the most common miscarriage symptoms is abdominal pain, which may be accompanied by paroxysmal cramping. 2. Vaginal bleeding: Vaginal bleeding is also a common miscarriage