Molar pregnancy

In a molar pregnancy the fertilisation of the egg by the sperm goes wrong and creates abnormal cells or clusters of water filled sacs inside the womb. It is also called a hydatidiform mole.

Risks and causes

Find out about the causes and risk factors for molar pregnancy.

Symptoms of molar pregnancy

Read about the possible symptoms of molar pregnancy and when you need to see a doctor.


Staging is a system that doctors use to describe the size of a tumour and whether it has spread.


Find out about survival for molar pregnancy.

Diagnosing molar pregnancy

Many molar pregnancies are picked up during routine ultrasound scans during pregnancy.

Treatment for molar pregnancy

Find out about treatments for molar pregancy. 

Coping with gestational trophoblastic disease (including molar pregnancy)

What you can do, who can help and how to cope with a diagnosis of gestational trophoblastic disease (GTD). 

Last reviewed: 
09 May 2019
Coronavirus and cancer

We know it’s a worrying time for people with cancer, we have information to help.

Read our information about coronavirus and cancer