Normal levels of serum prolactin

What are the normal levels of serum prolactin? Are they different in men and women? What levels are seen in patients with prolactin-secreting tumors?

The normal serum prolactin level is < 15 or 30 ng/mL, depending on the laboratory. Women tend to have slightly higher levels than men, probably because of estrogen stimulation of prolactin secretion. In patients with prolactin-secreting tumors, the levels are usually > 100 ng/mL but may be as low as 30 to 50 ng/mL if the tumor is small. A level > 200 ng/mL is almost always indicative of a prolactin-secreting tumor. Very high prolactin levels may be found to be falsely normal because of the high-dose hook effect of the assay; if clinically indicated, the sample should be assayed again after dilution.

15585

Sign up to receive the trending updates and tons of Health Tips

Join SeekhealthZ and never miss the latest health information

15856
Scroll to Top