What is the function of oxytocin during lactation?

Oxytocin plays a crucial role during lactation by causing the ejection of milk into the breast ducts, a process known as the "let-down reflex." When a baby suckles at the breast, nerve signals are sent to the mother's brain, prompting the release of oxytocin from the pituitary gland. This hormone acts on the myoepithelial cells surrounding the milk ducts, causing them to contract and push the milk toward the nipple, making it accessible for the infant. This physiological response not only facilitates feeding but also strengthens the mother-infant bond.

The other options do not accurately reflect the physiological roles of oxytocin in the context of lactation. For instance, while appetite regulation and weight management are important aspects of overall health, they are not directly influenced by oxytocin in the context of breastfeeding. Similarly, although taste in milk can be influenced by the mother's diet, oxytocin itself does not enhance or alter the taste of milk. Therefore, the primary and noteworthy function of oxytocin during lactation is the effective ejection of milk, making the provided answer correct.