The Prolactin test measures the level of prolactin hormone in your blood.
Prolactin is produced by the pituitary gland and is mainly responsible for:
Stimulating breast milk production after childbirth.
Supporting reproductive and metabolic functions.
Irregular or absent periods
Unexplained infertility
Nipple discharge (galactorrhea) when not pregnant or breastfeeding
Symptoms of early menopause
Erectile dysfunction
Low sex drive
Infertility
Breast enlargement (gynecomastia)
Suspected pituitary gland disorders (like prolactinoma, a benign tumor)
Unexplained headaches or vision problems (if tumor suspected)
(Ranges vary by lab)
| Group | Normal Range |
|---|---|
| Non-pregnant women | 4.8 – 23.3 ng/mL |
| Pregnant women | 34 – 386 ng/mL |
| Men | 4.0 – 15.2 ng/mL |
| High Prolactin (Hyperprolactinemia) | Low Prolactin (Hypoprolactinemia) |
|---|---|
| Pituitary tumor (prolactinoma) | Pituitary gland damage |
| Hypothyroidism (low thyroid) | Certain medications |
| Stress | Sheehan’s syndrome |
| Certain medications (antipsychotics, antidepressants) | Rare causes |
| Pregnancy & breastfeeding (normal) | — |
Same Day*
