Prolactin
Prolactin is a pituitary hormone that stimulates milk production. It rises during pregnancy, stress, or with prolactinoma.
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Normal ranges
Men: 53–360 mIU/L. Women (non-pregnant): 40–530 mIU/L.
Units: mIU/L
Causes of deviations
Low levels:
Rare, pituitary insufficiency.
High levels:
Pregnancy, prolactinoma, stress, certain medications.
When to see a doctor
If elevated with irregular periods or low libido.
Related biomarkers
Panels
Hormone panel
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