A new mother who is breastfeeding asks the nurse what triggers the transition from colostrum to mature milk.

The nurse correctly responds:

Choice A rationale

Frequent, effective milk removal is the principal determinant of milk production because it works on the principle of supply and demand, stimulating prolactin and oxytocin release. The more often the breast is emptied, the more the body signals the glands to synthesize milk, ensuring a robust and sustained supply for the newborn.

Choice B rationale

Breastfeeding only four times in 24 hours is insufficient for establishing and maintaining a full milk supply, as it does not provide enough stimulation or regular milk removal. Most newborns need 8 to 12 feedings in 24 hours, especially in the early weeks, to stimulate adequate milk production.

Choice C rationale

Supplementing with formula can decrease the newborn's demand for breast milk, leading to reduced milk removal from the breast. This reduced stimulation decreases the maternal prolactin levels, which in turn signals the body to decrease milk production, jeopardizing supply.

Choice D rationale

Using an electric pump only once per day is insufficient to maintain a full milk supply, especially if the newborn is not feeding frequently or effectively. Pumping should occur as frequently as the newborn would feed or after each feeding to maximize breast stimulation and milk output.

Choice A rationale

While notifying the provider is an important step in managing postpartum hemorrhage, the nurse's first, most immediate action is to attempt to stop or slow the blood loss. Manual massage of the fundus stimulates uterine muscle contraction, which compresses the open blood vessels at the placental site and reduces bleeding.

Choice B rationale

The first action when postpartum hemorrhage is suspected, indicated by a soft, boggy (atonic) uterus, is to initiate fundal massage. Massage stimulates the uterine muscles to contract, which mechanically occludes the bleeding vessels at the site where the placenta separated, thereby reducing blood loss and preventing life-threatening hemorrhage.

Choice C rationale

Preparing for surgery is a management option for intractable hemorrhage that does not respond to initial, less invasive measures like massage and uterotonic drugs. It is not the immediate, first-line action; immediate intervention focuses on stimulating uterine contraction through manual fundal massage.

Choice D rationale

Administering intravenous Pitocin (oxytocin) is the first-line pharmacologic intervention for uterine atony, but it is typically ordered concurrent with or immediately following fundal massage. The physical act of fundal massage is the most immediate, non-invasive first step to address the lack of uterine tone and reduce acute blood loss.