When Ling's newborn son cries, she can feel her breasts become engorged with milk. Which of the following is responsible for stimulating Ling's mammary gland ducts to lactate?

Question

Quizplus · Accepted Answer

Oxytocin is responsible for stimulating the contraction of smooth muscle cells surrounding the mammary gland ducts, which helps to eject milk from the breasts. This is known as the milk letdown reflex. Estrogen and progesterone play a role in preparing the breasts for lactation during pregnancy, while colostrum is the first type of milk produced by the breasts after childbirth.

When Ling's Newborn Son Cries, She Can Feel Her Breasts