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Prolactin levels are used, along with other tests, to help:

  • 1. Determine the cause of galactorrhea
  • 2. Determine the cause of headaches and visual disturbances
  • 3. Diagnose infertility and erectile dysfunction in males
  • 4. Diagnose infertility in females
  • 5. Diagnose prolactinomas
  • 6. Evaluate anterior pituitary function (along with other hormones)
  • 7. Monitor treatment of prolactinomas and detect recurrences

Why Do I Need It?:
To determine whether your prolactin levels are higher (or occasionally, lower) than normal.
When you have symptoms of elevated prolactin, such as galactorrhea and/or visual disturbances and headaches; as part of a workup for female and male infertility; for follow-up of low testosterone in men.

Other Relevant Tests:
FSH, LH, Testosterone, DHEAS, Estrogen, Progesterone

Test Details:
Normal Range:

Adult Male 2.0-18.0 ng/mL
Adult Female
3.0-30.0 ng/mL
Adult Female
10.0-209.0 ng/mL
Adult Female
2.0-20.0 ng/mL
Stages of Puberty
(Tanner Stages)
Female Observed
3.6-12.0 ng/mL
Stages of Puberty
(Tanner Stages)
Male Observed
≤10.0 ng/mL

High Results Indicate:
Elevated levels may indicate hypothalamic disease, hypothyroidism, kidney disease or pituitary tumors.