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Molar Pregnancy

Understanding molar pregnancy, what happens next, follow-up care, and emotional support.

1. What is a molar pregnancy?

A molar pregnancy (also called a hydatidiform mole) is a rare condition where the tissue that would normally become the placenta grows abnormally after fertilisation.
In a complete molar pregnancy there is no baby, only abnormal placental tissue. In a partial molar pregnancy there may be some fetal tissue, but a baby cannot survive.
It happens by chance because of a problem at fertilisation. It is not caused by anything you did or did not do.
Molar pregnancy is a type of gestational trophoblastic disease. In most cases it is not cancerous, but it needs careful follow-up.

2. Signs and how it is found

Many molar pregnancies are found at a routine early pregnancy ultrasound scan.
Possible signs include vaginal bleeding or spotting in early pregnancy, a uterus that feels larger than expected, or unusually severe nausea and vomiting.
Blood tests may show a much higher level of the pregnancy hormone hCG than expected.
Diagnosis is usually confirmed by examining the tissue in a laboratory after it is removed.

3. Treatment and what to expect

A molar pregnancy cannot continue, and the abnormal tissue usually needs to be removed, most commonly with a small procedure to empty the womb.
You may be asked to give blood and urine samples afterwards so your hCG level can be monitored until it returns to normal.
Bleeding and cramping for a few weeks afterwards is common. Contact your maternity or gynaecology team if bleeding is heavy, you have severe pain, a fever, or offensive-smelling discharge.
A small number of women need further treatment, which is usually very effective. Your specialist team will explain if this applies to you.

4. Follow-up and future pregnancies

Follow-up monitoring of hCG levels is important and may continue for several months. Try not to miss appointments or sample deadlines.
You will usually be advised to avoid becoming pregnant again until your follow-up is complete, and to discuss contraception with your healthcare team.
Most women who have had a molar pregnancy go on to have healthy pregnancies in the future.
Tell your midwife or doctor about your history early in any future pregnancy so an early scan and extra checks can be arranged.

5. Looking after your feelings

A molar pregnancy is a pregnancy loss as well as a medical condition. Grief, shock, anger, and numbness are all normal responses.
You may find the ongoing monitoring and the wait before trying again especially hard. That is understandable.
Partners grieve too, often differently. Talking honestly, or seeing a counsellor together, can help.
Specialist charities and trophoblastic disease centres offer information, helplines, and peer support. Your team can point you to services in your country.

6. Disclaimer

This information is provided for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Care pathways and follow-up protocols for molar pregnancy vary between countries. Always follow the advice of your midwife, doctor, obstetrician, or specialist centre, and seek urgent medical attention if you feel unwell.

When in doubt, ask a professional

This guide is for general information only. If you're worried about your baby's health or feeding, speak with your GP, health visitor, or paediatrician.