What is the function of prolactin?

The function of prolactin is primarily to stimulate milk production and secretion in the mammary glands. This hormone is crucial during and after pregnancy, as it prepares the breasts for breastfeeding by promoting the development of milk-producing tissues. Prolactin levels increase significantly during pregnancy and remain elevated during lactation, thereby supporting the infant's nutritional needs through breast milk.

In addition to its main role in lactation, prolactin has various other functions, such as modulating the immune system and influencing reproductive health, but its standout and well-recognized role remains in facilitating milk production. This is why the selection indicating its role in stimulating milk production and secretion accurately reflects its primary physiological function.