If a spontaneous abortion (miscarriage) does not occur and the diagnosis is confirmed, a therapeutic abortion is performed by suction curettage (D and C).

Following either case, serum HCG levels are monitored to assure they return to a normal, non-pregnant level. A hysterectomy may be an option for older women who do not desire future pregnancies.

More than 80% of hydatidiform moles are benign. The outcome after treatment is usually excellent. Close follow-up is essential. Highly effective means of contraception are recommended to avoid pregnancy for at least 6 to 12 months.

In 10 to 15% of cases, hydatidiform moles may develop into invasive moles. These may intrude so far into the uterine wall that hemorrhage or other complications develop.

In 2 to 3% of cases, hydatidiform moles may develop into choriocarcinoma, which is a malignant, rapidly- growing, and metastatic (spreading) form of cancer. Despite these factors which normally indicate a poor prognosis, the rate of cure after treatment with chemotherapy is high.

Over 90% of women with malignant, non-spreading cancer are able to survive and retain their ability to have children. In those with metastatic (spreading) cancer, remission remains at 75 to 85%, although the ability to have children is usually lost.

Call your obstetrician if you suspect a hydatidiform mole.

If you have symptoms suggestive of preeclampsia -- such as severe swelling in the legs and feet, abdominal pain and high blood pressure -- see your health care provider immediately, call the local emergency number (such as 911), or get to the emergency room. This can rapidly become a life-threatening emergency.