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By Mayo Clinic staffPlacental abruption can begin anytime after 20 weeks of pregnancy. Classic signs and symptoms of placental abruption include:
- Vaginal bleeding
- Abdominal pain
- Back pain
- Uterine tenderness
- Rapid uterine contractions, often coming one right after another
Abdominal and back pain often begin suddenly. The amount of vaginal bleeding can vary greatly. The amount of blood doesn't necessarily correspond to how much of the placenta has separated from the inner wall of the uterus.
If you experience any signs or symptoms of placental abruption, seek emergency care.