What tropic hormone is involved in the milk ejection reflex?

Answer 1

Prolactin is the hormone secreted by the pituitary gland that controls milk production. Therefore it is elevated in pregnant and nursing women. It can also become elevated by taking certain medications such as Risperdal. When prolactin is being produced at a high enough level menstruation stops.

Too much production of prolactin can cause a condition called prolactinemia which can produce small benign tumors in the pituitary known as prolactinoma. These tumors usually go unnoticed, but if they grow too large they can press against the optical nerve reducing vision. It's noticed most often by loss of peripheral vision. The tumors are found by MRI scans.

Answer 2

Oxytocin is the hormone involved in the milk ejection reflex, also known as the let-down reflex. It is released from the pituitary gland in response to suckling or nipple stimulation, causing the contraction of the milk ducts in the breast to push milk towards the nipple for breastfeeding.

Answer 3

oxytosin contracts the smooth muscle in the mammery glands to help let down the milk