Page "Breast" Paragraph 32

In a woman, the condition of lactation unrelated to pregnancy can occur as galactorrhea ( spontaneous milk flow ), and because of the adverse effects of drugs ( e. g. antipsychotic medications ), of extreme physical stress, and of endocrine disorders.

In a newborn infant, the capability of lactation is consequence of the mother's circulating hormones ( prolactin, oxytocin, etc.

) in his or her blood stream, which were introduced by the shared circulatory system of the placenta ; neonatal milk, the milk from a lactating infant, is also known as witch's milk.

In men, the mammary glands are also present in the body, but normally remain undeveloped because of the hormone testosterone, however, when male lactation occurs, it is considered a pathological symptom of a disorder of the pituitary gland.