Molar pregnancy: symptoms, treatment and the follow-up that matters

What it is

A molar pregnancy happens when the tissue that should become the placenta grows abnormally. In a complete mole there is no fetus at all; in a partial mole there is abnormal fetal tissue that cannot survive.

It is uncommon, and rates are somewhat higher in parts of Asia than in Western countries. It is more likely at the extremes of reproductive age — under 20 and over 40.

It is nobody's fault and it is not caused by anything either partner did.

Symptoms and diagnosis

Symptoms: bleeding in early pregnancy, often dark; severe nausea and vomiting beyond the usual; a uterus larger than expected for the dates; sometimes the passing of grape-like tissue; and occasionally early high blood pressure or thyroid overactivity.

Diagnosis: ultrasound, which shows a characteristic appearance, and a very high hCG level. Confirmation comes from examining the tissue after removal.

Any of these symptoms needs same-day assessment — they overlap with other serious causes of early bleeding.

Treatment and the follow-up

Treatment is removal of the tissue, usually by suction evacuation under anaesthesia. It is a routine procedure and recovery is usually quick.

The follow-up is what distinguishes this from other losses. hCG is measured repeatedly — weekly at first, then monthly — for months, to make sure it falls to zero and stays there.

The reason is that in a small proportion of cases, molar tissue persists and can become gestational trophoblastic neoplasia, which requires chemotherapy. Caught early through follow-up, it is highly treatable, with excellent cure rates.

You will be advised not to conceive during the follow-up period — usually six months to a year depending on the type and how quickly hCG falls — because a new pregnancy raises hCG and makes the monitoring impossible. Reliable contraception during this time is essential, and your doctor will advise which.

This follow-up is skipped alarmingly often once a woman feels well. It is the single most important part of the treatment.

When to see a doctor

Go to hospital immediately for: bleeding that soaks a pad an hour or more, severe or one-sided abdominal pain, dizziness or fainting, shoulder-tip pain, fever with chills, or foul-smelling discharge. A positive pregnancy test with one-sided pain and bleeding needs assessment the same hour — an ectopic pregnancy is life-threatening. Call 108 if you cannot travel quickly.

Same-day: heavy bleeding, severe vomiting with dehydration, breathlessness, chest pain, severe headache, or the passing of unusual tissue.

And attend every hCG follow-up appointment even when you feel entirely well — that is what the monitoring is for.

Grief after a pregnancy loss is real grief, at any number of weeks. If you are struggling — persistent low mood, hopelessness, panic, an inability to function, or any thought of harming yourself — that deserves help rather than endurance. Tele-MANAS on 14416 is free, confidential and answers round the clock in Indian languages.

This article is general information, not medical advice, and is no substitute for personal medical advice. For any decision about your or your child's health, please consult your doctor.

Frequently asked questions

Q: Can I have a normal pregnancy afterwards? — Yes. The great majority of women who have had a molar pregnancy go on to have normal pregnancies once the follow-up is complete.

Q: Why can I not try again straight away? — Because a new pregnancy raises hCG, which is the marker being used to confirm that no molar tissue remains. Conceiving during that window removes the ability to detect a problem early.

Q: Will it happen again? — The risk of a repeat molar pregnancy is higher than the background rate but still low. Tell your obstetrician at the first visit of any future pregnancy, and an early scan will be arranged.

Q: Does it mean cancer? — Most molar pregnancies resolve completely after removal. A small proportion persist and need chemotherapy, which has very high cure rates — and the follow-up exists precisely to catch that early.