Serum Prolactin

Prolactin plays a crucial role in a wide range of physiological processes, particularly in the initiation and maintenance of breastfeeding in women. Its release is controlled by the pituitary gland and can be influenced by several factors, including pregnancy, breastfeeding, emotional or physical stress, sleep patterns, and certain medications.

The Serum Prolactin test helps diagnose hyperprolactinemia (high prolactin levels).It can be  caused by certain medicines, pituitary tumors (called prolactinomas), thyroid problems, and kidney or liver disease. This test can also detect low prolactin levels, which are rare but can be caused by certain drugs or pituitary disorders.

Doctors may recommend this test to women who have unusual breast milk discharge (not related to pregnancy), irregular periods, or fertility problems. On the other hand, men can get this test when they have symptoms like low sex drive, erection problems, or abnormal breast growth.

Prolactin levels change throughout the day and can be affected by stress, exercise, sleep, and sexual activity. Although fasting is not mandatory, your doctor may ask for a morning blood sample, taken 2–3 hours after waking upIf mildly elevated prolactin levels do not match the clinical symptoms, your doctor may recommend a pooled prolactin test on another day. This involves collecting three blood samples at 15–20 minute intervals to reduce the impact of natural fluctuations (pulsatility) in prolactin levels.

Test result ranges may vary slightly across laboratories. Talk with your doctor to understand what your result means. Based on the findings, they may recommend lifestyle changes or medications to manage your health.