Excessive or inappropriate production of milk.
- Thyroid stimulating hormone, testosterone, and prolactin concentrations need be checked only if cycles are irregular or absent, suggesting anovulation, galactorrhoea, or symptoms of thyroid disorder.
- Symptoms of hyperprolactinaemia include amenorrhoea, galactorrhoea, infertility, loss of libido and erectile dysfunction.
- Although the commonest presentation is secondary amenorrhoea, some women may present with galactorrhoea.
Mid 19th century: from Greek gala, galakt- 'milk' + rhoia 'flux, flow'.
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