Prolactin
Prolactin is a pituitary hormone that stimulates milk production during and after pregnancy and modulates reproductive function. Elevated levels outside pregnancy suppress GnRH and cause irregular periods, infertility, galactorrhea, and reduced libido, and are often from pituitary adenomas (prolactinomas), medications (especially antipsychotics), hypothyroidism, or stress.
11 of 22 providers
Sex Hormones (Female)
2-29 ng/mL (non-pregnant women), 10-209 ng/mL (pregnant women)
What is Prolactin?
Prolactin is a pituitary hormone that stimulates milk production during and after pregnancy and modulates reproductive function. Elevated levels outside pregnancy suppress GnRH and cause irregular periods, infertility, galactorrhea, and reduced libido, and are often from pituitary adenomas (prolactinomas), medications (especially antipsychotics), hypothyroidism, or stress.
Why It Matters
Elevated levels suppress ovulation and cause irregular periods. High prolactin causes infertility and may indicate pituitary tumor.
Which Providers Test Prolactin?
Full Provider Comparison
| Provider | Includes | Annual Cost | Biomarkers |
|---|---|---|---|
 Superpower | ✓ | $199 | 100+ (150 with ratios) |
 WHOOP Advanced Labs | — | $349 | 65 |
 Labcorp OnDemand | — | $398 | 40+ |
| — | $486 | 40+ | |
| — | $449 | 288 | |
| ✓ | $349 | 100+ | |
| — | $829 | 54 | |
 Function Health | ✓ | $365 | 160+ |
| — | $250 | 65 | |
| ✓ | $495 | 80+ | |
| ✓ | $895 | 100+ | |
| ✓ | $1950 | 130+ | |
| ✓ | $375 | 95+ | |
| — | $Varies | 75+ | |
| — | $190 | 100+ | |
| — | $99 | 50 | |
| ✓ | $124 | 60 | |
| ✓ | $349 | 130+ | |
| ✓ | $349 | 80+ | |
| — | $375 | 85 | |
| — | $700 | 128 | |
| ✓ | $99 | 100+ |
Frequently Asked Questions
What is Prolactin?
Prolactin is a pituitary hormone that stimulates milk production during and after pregnancy and modulates reproductive function. Elevated levels outside pregnancy suppress GnRH and cause irregular periods, infertility, galactorrhea, and reduced libido, and are often from pituitary adenomas (prolactinomas), medications (especially antipsychotics), hypothyroidism, or stress.
What is the optimal range for Prolactin?
The standard reference range for Prolactin is 2-29 ng/mL (non-pregnant women), 10-209 ng/mL (pregnant women). Optimal ranges may differ based on individual health goals and expert recommendations.
Which blood test providers include Prolactin?
11 out of 22 blood testing providers include Prolactin in their panels. This biomarker is widely available across major providers.
What category does Prolactin fall under?
Prolactin is categorized under Sex Hormones (Female). This category includes biomarkers that help assess related aspects of health and wellness.
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Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed:2026-04-12