Prolactin – Prolactin is a pituitary hormone best known for supporting milk production, but it also influences reproductive hormones.
What Prolactin measures
Prolactin measures prolactin levels – useful when investigating irregular periods, fertility issues, or unexplained milk production.
Typical ranges
Non-pregnant reference ranges are relatively low; labs provide sex-specific values. Pregnancy and breastfeeding raise it naturally. Reference ranges differ between laboratories and by age and sex, so always read your result against the range printed on your own report.
What high results can mean
Can suppress reproductive hormones and cause irregular cycles or low testosterone; sometimes from a benign pituitary growth.
What low results can mean
Rarely a clinical concern on its own.
How the test is done
A blood sample, ideally a few hours after waking; stress and recent activity can temporarily raise it. At-home collection works well for this marker when the sample is processed by a certified lab.
FAQ
What is a normal Prolactin level?
Non-pregnant reference ranges are relatively low; labs provide sex-specific values. Pregnancy and breastfeeding raise it naturally. Your ideal target depends on your age, sex, and health history, so review results with a clinician.
What does a high Prolactin result mean?
Can suppress reproductive hormones and cause irregular cycles or low testosterone; sometimes from a benign pituitary growth.
Can I test Prolactin at home?
Yes. A blood sample, ideally a few hours after waking; stress and recent activity can temporarily raise it. An at-home sample processed by a certified lab gives reliable results.
This article is educational and not a substitute for medical advice. Discuss your results with a qualified clinician.