Hormones & markers · In plain English

Prolactin

A pituitary hormone important in milk production. When raised outside the expected setting, it can be relevant to menstrual, ovulatory or reproductive symptoms.

Also searched as: prolactin blood test

Why you might see this term

Pregnancy, breastfeeding, some medicines, stress and other conditions can influence a result. Unexpected results may need repeat or further testing.

What to keep in mind

A raised result does not automatically mean a pituitary tumour. Do not stop prescribed medicine without advice.

Sources & further reading

Prepared by ProFertility · Updated 23 October 2026.

Educational information based on the linked sources. This explanation is not an individual diagnosis or a treatment recommendation. A term appearing here does not mean the test is necessary or included in a particular kit.

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