What hormone induces milk let down? a b c or d Oxytocin Adrenalin Cortisol Estrogen

The hormone that induces milk let down is Oxytocin.

Explanation

Oxytocin is often referred to as the "love hormone" or "bonding hormone" due to its roles in social bonding, sexual reproduction, and childbirth. During the process of breastfeeding, when a baby latches onto the breast, sensory nerves in the nipple send signals to the brain to release oxytocin from the pituitary gland. This hormone then causes the muscles around the milk ducts to contract, thereby helping to eject milk from the breast—a process known as milk let down. This reflex is crucial for the feeding process, allowing infants to receive the nutrition they need from their mother's milk.

In contrast, the other hormones listed—Adrenalin, Cortisol, and Estrogen—do not play a direct role in the milk let down reflex. Adrenalin primarily prepares the body for stress responses, Cortisol manages metabolism and stress responses, and Estrogen is involved in the development of female secondary sexual characteristics and the menstrual cycle, among other functions.

Final Answer

Oxytocin is the hormone that induces milk let down.