Prolactin
Prolactin is produced by the pituitary gland. While essential for lactation, elevated levels in non-pregnant individuals (hyperprolactinemia) can suppress reproductive hormones and cause infertility, low libido, and irregular periods.
Common causes of elevation include stress, medications (SSRIs, antipsychotics), and pituitary adenomas.
What It Measures
Serum prolactin from the anterior pituitary.
Reference Ranges
| Status | Range (ng/mL) |
|---|---|
| Optimal | < 15 ng/mL |
| Normal | 2–25 ng/mL (women), 2–18 ng/mL (men) |
| Borderline | 25–50 ng/mL |
| Out of Range | > 50 ng/mL |
Interpreting Your Results
When Values Are High
Pituitary adenoma (prolactinoma), medications (antipsychotics, SSRIs, metoclopramide), hypothyroidism, stress, or nipple stimulation.
When Values Are Low
Pituitary hypofunction. Rarely clinically significant unless symptomatic.
How GATOR Tracks This
Lab Providers
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
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