Prolactin Test: Purpose, Procedure & Understanding Abnormal Levels
Summary The Prolactin Test (PRL test) measures the level of prolactin , a hormone produced by the pituitary gland , located at the base of the brain. Prolactin plays a vital role in breast development during pregnancy and milk production after childbirth. Normally, prolactin levels remain low in men and non-pregnant women. However, abnormally high levels — a condition known as hyperprolactinemia — may indicate pituitary gland disorders , hormonal imbalances , or certain medic al conditions such as hypothyroidism or kidney disease . This test helps identify underlying causes of infertility , menstrual irregularities , low libido , or galactorrhea (milk secretion in non-lactating individuals) . What Is a Prolactin Test? A prolactin blood test evaluates the amount of prolactin hormone circulating in your bloodstream. Produced by: Pituitary gland (the body’s “master gland”) Main function: Stimulates breast tissue growth and milk production in new mothers ...