Which hormone is responsible for stimulating the release of milk from the mammary glands during lactation?

A Oxytocin ✓
B Prolactin
C Estrogen
D Progesterone

Explanation

Oxytocin is a hormone released by the posterior pituitary gland that stimulates the contraction of smooth muscle in the mammary glands, leading to the release of milk during lactation.

Mnemonic

'Oxy' = 'ox' (strong) contraction

Source

Berne and Levy Physiology
Hormones and Endocrine Markers Endocrinology Lactation and Breastfeeding Medium MEDICAL Confidence: high