Milk "comes in" during which stage of lactogenesis?

Question

Quizplus · Accepted Answer

Milk "comes in" during Lactogenesis II, which typically occurs 2-5 days postpartum. During Lactogenesis II, milk production increases significantly and milk composition changes to mature milk. Lactogenesis I occurs during pregnancy and involves the development of mammary gland tissue, but milk production is minimal. Lactogenesis III occurs weeks/months after birth and is characterized by milk production being more fully established. Lactogenesis IV and V are not recognized stages of milk production.

Milk "Comes In" During Which Stage of Lactogenesis