Bleeding in molar pregnancy

Bleeding may be light, heavy, intermittent, red or brown. Its appearance alone cannot confirm the cause or show how much treatment is needed.

A molar pregnancy develops when tissue that would normally contribute to the placenta grows abnormally after conception. Abnormal vaginal bleeding is one possible presentation, although some molar pregnancies are first identified on an ultrasound scan or after pregnancy tissue is examined.

Bleeding during pregnancy also has other possible causes, so clinicians use your symptoms together with an ultrasound scan, examination when appropriate, and blood tests for the pregnancy hormone hCG. A diagnosis is not made from bleeding alone.

Contact your maternity unit, early-pregnancy service, obstetrician or gynaecologist promptly about any bleeding. Note when it began, the colour, whether it is increasing, whether clots or tissue are present, and whether you have pain, dizziness, nausea or weakness. Use a sanitary pad rather than a tampon so you can monitor the bleeding.

If a molar pregnancy has already been treated, report new or increasing bleeding to the team overseeing your follow-up. Keep scheduled hCG blood or urine tests because the trend helps show whether molar tissue remains. Further treatment, including chemotherapy, is considered only when follow-up results and specialist assessment indicate it is needed.

Go to the nearest emergency department or call local emergency services if bleeding is heavy or rapidly increasing, or if it occurs with severe abdominal pain, shoulder pain, fainting, marked dizziness, confusion, breathing difficulty, chest pain or severe weakness. Do not drive yourself if you feel faint or unwell.

Even light spotting should be discussed promptly during pregnancy or after treatment for a molar pregnancy. The urgency comes from the bleeding and accompanying symptoms, not from assuming that the symptom identifies a particular diagnosis.

Ask what is causing the bleeding, which changes should send you to emergency care, how your hCG results are changing, and when the next test is due. You can also ask whom to contact outside clinic hours, whether any medicines or activities need adjusting, and what the next step would be if hCG stops falling.