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Some women with polycystic ovary syndrome may have mildly elevated prolactin levels. [18] Premenstrual dysphoric disorder appears to be also correlated with elevated prolactin levels. [33] In men, hyperprolactinemia leads to hypoactive sexual desire and, occasionally, erectile dysfunction. However, the link between erectile dysfunction and ...
Galactorrhea hyperprolactinemia is increased blood prolactin levels associated with galactorrhea (abnormal milk secretion). It may be caused by such things as certain medications, pituitary disorders and thyroid disorders. The condition can occur in males as well as females.
General guidelines for diagnosing prolactin excess (hyperprolactinemia) define the upper threshold of normal prolactin at 25 μg/L for women and 20 μg/L for men. [59] Similarly, guidelines for diagnosing prolactin deficiency (hypoprolactinemia) are defined as prolactin levels below 3 μg/L in women [72] [73] and 5 μg/L in men.
Galactorrhea is reported to occur in 5–32% of females. Much of the difference in reported incidence can be attributed to different definitions of galactorrhea. [ 1 ] Although frequently benign, it may be caused by serious underlying conditions and should be properly investigated. [ 2 ]
Similar to primary amenorrhea, evaluation of secondary amenorrhea also begins with a pregnancy test, prolactin, FSH, LH, and TSH levels. [13] A pelvic ultrasound is also obtained. [13] Abnormal TSH should prompt a thyroid workup with a full thyroid function test panel. [13] Elevated prolactin should be followed with an MRI to look for masses.
Abnormal levels of certain neurotransmitters, such as serotonin Changes in levels of certain hormones, such as prolactin or luteinizing hormone (LH) Mental health issues, such as depression ...
High levels of prolactin during pregnancy and breastfeeding also increase insulin resistance, increase growth factor levels (IGF-1) and modify lipid metabolism in preparation for breastfeeding. During lactation, prolactin is the main factor maintaining tight junctions of the ductal epithelium and regulating milk production through osmotic balance.
Low levels of dopamine lead to high levels of prolactin. By contrast, in classical PKU (without dihydrobiopterin involvement), prolactin levels would be relatively normal. [32] [citation needed] As of 2020, tetrahydrobiopterin deficiency was known to result from defects in five genes. [33]