Tissue remaining in the uterus (retained products of conception). Cramping belly pain and bleeding will occur again within a week of the procedure.
Infection. Symptoms of fever of 100.4°F (38°C) or higher, pain, and belly tenderness will usually start within 2 to 3 days of the procedure. But you can have a serious infection without fever.
Blood clots blocking the cervix (hematometra). If the uterus doesn't contract to pass all of the tissue, the cervical opening can become blocked. This prevents blood from leaving the uterus. The uterus will become enlarged and tender. Belly pain, cramping, and nausea may be present.
Moderate to severe bleeding (hemorrhage). Bleeding may be more than normal if:
Products of conception are retained in the uterus.
The uterus has not contracted toward its prepregnancy size (atony).
Uterine muscle rupture has occurred. In rare cases, a uterine incision scar tears open when a medicine is used to induce contractions.
When a medical abortion fails, a surgical abortion must be done as follow-up to prevent complications or development of a fetus with abnormalities.
Follow-up examination after a medical abortion
A follow-up examination is done about 2 weeks after a medical abortion. The examination may include: