Ans - Lactation can be defined as the process of milk secretion from the mammary glands of a female after childbirth. It is the process after which a woman is capable of feeding her milk to her child. The milk produced in the mammary glands of a woman provides nutrition and immunity to the young newborn. At the same time, having milk in the mammary gland is not enough but maintaining it is also important. The stage that maintains milk production and requires prolactin and oxytocin is called Galactopoiesis.