The most important hormones found in milk and other dairy products by using a variety of analytical methods consist of prolactin, steroids including estrogens, progesterone, corticoids, and androgens.
The two primary hormones that are needed for lactation are prolactin and oxytocin. ... Suckling stimulates an increase in prolactin levels, which is important for the initiation of milk production as well as the maintenance of milk production once lactation has been established.
