Lactation is the biological process through which mammals produce milk to feed their young. This process is primarily regulated by hormones, particularly prolactin and oxytocin, which stimulate milk production and release. Lactation typically begins after childbirth and can continue for several months or even years, depending on the species and individual circumstances. During lactation, milk is produced in the mammary glands and delivered to the offspring through the nipple. The composition of the milk varies among species, providing essential nutrients and antibodies that support the growth and immune system of the young. This process is crucial for the survival and development of mammalian infants.