What term refers to the secretion of milk by an infant's breasts due to maternal hormones?

The term that specifically refers to the secretion of milk by an infant's breasts due to maternal hormones is "witch's milk." This phenomenon occurs in newborns or infants due to the influence of maternal hormones, particularly estrogens, that cross the placenta during pregnancy. It typically resolves on its own as hormone levels stabilize, and the presence of this milk can be seen in both male and female infants.

Colostrum refers to the first form of milk produced by the mammary glands immediately following delivery, rich in antibodies and nutrients for the newborn. Mastitis is an inflammation of breast tissue that can lead to infection and is not associated with the hormonal secretions present in infants. Galactorrhea is a condition characterized by inappropriate lactation not related to childbirth or nursing, often linked to hormonal imbalances in the mother.

In summary, "witch's milk" is the correct term for this specific situation in which infants exhibit involuntary lactation due to the effects of maternal hormones.