Serum Prolactin Mass Concentration

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have symptoms like irregular menstrual periods, infertility, breast tenderness, or unexplained galactorrhea (milk production outside of breastfeeding). It may also be checked in cases of suspected pituitary tumors, thyroid disorders, or certain medications that affect hormone levels.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications (like some antidepressants or antipsychotics) that could influence prolactin levels. Avoid smoking or caffeine 24 hours before the test, as they might affect results.

During the Test

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause significant discomfort. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results help determine if your prolactin levels are within normal ranges or if they’re too high or too low. High levels may suggest conditions like a pituitary tumor or certain medications, while low levels might indicate thyroid issues or other hormonal imbalances.