Overview
A molar pregnancy forms when the placenta grows abnormally. There's usually no baby or a baby that can't survive.
After removal, hCG is checked until it's zero to make sure no tissue remains.
Symptoms
Common signs:
- Bleeding in early pregnancy
- Grape-like tissue passed, or severe vomiting with bleeding in early pregnancy
Less common
- Severe nausea
- Very high hCG
Look up a symptom: Grape-like tissue passed, or severe vomiting with bleeding in early pregnancy · Pregnant or recently gave birth
When to get medical care
Causes
Abnormal fertilization.
Does it spread or run in families?
- It isn't contagious. You can't catch it from someone else.
Who is more likely to get it
- Women under 20 or over 40: Higher risk
Possible complications
- Gestational trophoblastic disease: Tissue keeps growing; needs follow-up
Diagnosis
Ultrasound and hCG.
Treatment
Follow up.
Self-care
- Use birth control during follow-up
- Keep hormone follow-up tests
Prevention
To lower your risk or prevent problems:
- There is no known way to prevent it. Early checkups help find it sooner.
Which doctor treats this
- Start with your primary care provider (family doctor or internist).
- They may send you to an OB-GYN or midwife; high-risk pregnancies may see a maternal-fetal medicine doctor.
Living with it
Support groups and helplines
- Genetic and Rare Diseases Information Center (GARD): Free NIH information on rare diseases, including where to find experts and patient groups.
- National Organization for Rare Disorders (NORD): Patient groups, help finding care, and aid programs for rare diseases.
Children, pregnancy, and older adults
- Under 20 or over 35: Higher risk.
- Women under 20 or over 40: Higher risk.
Outlook
Cured with treatment.
Cure rates are very high.
Getting ready for your visit
Bring a list of your symptoms and medicines.
What to bring
- A list of your medicines and supplements
- Notes on when symptoms started and what makes them better or worse
Questions to ask
- How long will follow-up last?
Research studies
Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.
Sources
Last updated 2026-11-12.