Common symptoms include light to heavy vaginal bleeding constantly or intermittently. Though there may be sporadic bleeding in the first trimester of pregnancy, but the bleeding associated with pain may indicate higher chances of miscarriage. Persistent abdominal pain, pelvic cramps, lower backaches are some of the signals. Many females experience passing of vaginal blood clots. The miscarriage condition can only be properly evaluated by a specialist gynecologist because of variation of experiences of different females.