Macmillan Learning
Waverly and Steffi are attending childbirth classes. When the couple gets to the section on breast-feeding, they learn the
complexity of the physiological process. Which of these statements would MOST likely characterize what Waverly and
Steffi have learned about breast-feeding in their class?
The gonads signal the production of oxytocin by the pituitary gland, causing milk letdown.
The thyroid gland signals the production of serotonin by the pituitary gland, causing milk letdown.
Progesterone causes the let-down of milk into the nipple by stimulating the hypothalamus.
Oxytocin produces the let-down reflex that causes the stored milk to let down into the nipple.
