Sue has begun to lactate, but she has not recently given birth. Which of the following might be causing this abnormality?
A) excess estrogen
B) progesterone production
C) hyperthyroidism
D) pituitary tumor

Question

Quizplus · Accepted Answer

Lactation without pregnancy or nursing is known as galactorrhea and can be caused by a pituitary tumor that affects the secretion of prolactin. Prolactin stimulates milk production, and an excess of it can lead to lactation even in the absence of pregnancy or nursing. Excess estrogen or progesterone production may contribute to lactation, but it is less likely to be the sole cause. Hyperthyroidism is not typically associated with lactation.

Sue Has Begun to Lactate, but She Has Not Recently