Skip to content
knowrare
HealthSignal
Your condition community

Living with Hydatidiform mole

A condition of the placenta in early pregnancy, in which women have repeat abnormal pregnancies called moles.

Understanding Hydatidiform mole

Hydatidiform mole, in its recurrent form, is a condition in which a woman has at least two abnormal pregnancies that form moles.

A mole is a mass early in pregnancy made of cells from an abnormally developed embryo and placenta. The first sign is often vaginal bleeding in the first trimester. Ultrasound may show many small sacs, like a bunch of grapes. A mole must be removed by surgery, typically by the end of the first trimester. After removal, there is up to a 20 percent chance that leftover tissue grows into a tumor that needs follow-up.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Vaginal bleeding in early pregnancy
  • Enlarged uterus
  • Nausea and vomiting
  • Low red blood cells (anemia)
  • Heavy, irregular periods (menometrorrhagia)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include cancer specialists, gynecologic cancer specialists, maternal-fetal medicine specialists and women’s reproductive health specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Cancer specialists (oncologists); Gynecologic cancer specialists (gynecologic oncologists); Maternal-fetal medicine specialists (pregnancy-related); Women’s reproductive health specialists (obstetricians / gynecologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with American Cancer Society and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
What follow-up tests are needed after removal?
When is it safe to try for another pregnancy?
Would genetic testing help explain repeat moles?

Quick facts

Symptoms usually startTeenager and as an Adult
InheritanceAutosomal Recessive

GARD lists autosomal recessive inheritance for the recurrent form. It doesn't name a gene.

Urinary and Reproductive

Also known as: hydatid mole; hydatidiform mole, recurrent; hydatidiform moles; molar pregnancy

Patient organizations

Source: NIH GARD · Hydatidiform moleGARD ID 10263 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Hydatidiform mole.

Explore the Hydatidiform mole blog

Explore research for Hydatidiform mole

Explore actively recruiting Hydatidiform mole studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Hydatidiform mole with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

Powered by HealthSpark, our AI chat helper

I can help you find recruiting Hydatidiform mole studies. Enter a ZIP code, address or city below and I'll look within 50 miles.

Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

Get Signals for Hydatidiform mole

Stay in the loop with community stories and updates from medical researchers.

HealthStoryfor Hydatidiform mole

Create a living journal that talks back

HealthStory evolves private journaling with a living AI journal that talks back and asks thoughtful questions, helping you capture your Hydatidiform mole experiences more deeply and prepare for better conversations with your doctors and care team.

Start your journal

Your journal is private. Sharing your story publicly is a separate choice, made with Share your story above.