Which hormone has only one known effect: to stimulate milk production by the breasts?
A) oxytocin
B) estrogen
C) progesterone
D) prolactin

Name: Which hormone has only one known effect: to stimulate milk production by the breasts? A) oxytocin B) estrogen C) progesterone D) prolactin
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Question

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Prolactin has only one known effect, which is to stimulate milk production by the breasts. The other hormones listed, oxytocin, estrogen, and progesterone have additional known effects beyond just milk production.

Which Hormone Has Only One Known Effect: to Stimulate Milk