A nurse is teaching a new mother about breastfeeding. The nurse determines that the teaching was successful when the woman identifies which hormone as responsible for milk let-down?

progesterone

estrogen

prolactin

oxytocin

Answer and Explanation

The Correct Answer is D

A. Progesterone plays a significant role in maintaining pregnancy and preparing the breasts for lactation, but it is not responsible for the milk let-down reflex.
B. Estrogen helps with breast development and ductal growth during pregnancy, but it does not trigger the milk let-down reflex.
C. Prolactin is responsible for milk production (lactogenesis) but not for the actual release of milk from the breast.
D. Oxytocin is the hormone responsible for the milk let-down reflex, which causes milk to be released from the milk glands into the nipple when the baby suckles. It also promotes uterine contractions after childbirth.

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Correct Answer is A

Explanation

A. Newborns typically go through predictable behavioral states after birth. During the first period of reactivity, which lasts about 30–60 minutes after birth, the newborn is awake, alert, and active. This is followed by a period of sleep or decreased activity, which can last 2 to 4 hours. It is normal for the baby to be sleepy and difficult to awaken during this phase, especially around 2 hours of age.

B. Probable hypoglycemia could cause lethargy in a newborn, but it would typically be accompanied by other symptoms such as jitteriness, poor feeding, or abnormal vital signs. In a healthy 2-hour-old baby, sleepiness alone is not enough to suggest hypoglycemia.

C. Physiological abnormality is incorrect. There is no evidence of abnormality in a sleepy 2-hour-old newborn, as this is an expected part of the normal behavioral cycle after birth.

D. Inadequate oxygenation would likely present with signs such as cyanosis, abnormal respiratory rate, or poor perfusion, not just sleepiness.

A. two fingerbreadths above the umbilicus B. two fingerbreadths below the umbilicus C. four fingerbreadths below the umbilicus D. at the level of the umbilicus

Correct Answer is B

Explanation

A. Two fingerbreadths above the umbilicus would not be a normal finding 48 hours postpartum. By this time, the uterus should be well on its way to returning to its pre-pregnancy size and position, typically about 1 to 2 fingerbreadths below the umbilicus.

B. Two fingerbreadths below the umbilicus is the expected finding 48 hours postpartum. After birth, the uterus begins to shrink (involution) and descend into the pelvic cavity. By 48 hours, the fundus is usually 1–2 fingerbreadths below the umbilicus.

C. Four fingerbreadths below the umbilicus would be more typical of a finding several days later, after the process of involution continues. This could be a sign that the uterus is shrinking at the expected rate.

D. At the level of the umbilicus is typically expected within the first 24 hours after delivery, but by 48 hours postpartum, the fundus should have descended slightly below the level of the umbilicus.

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A nurse is teaching a new mother about breastfeeding. The nurse determines that the teaching was successful when the woman identifies which hormone as responsible for milk let-down?

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Naxlex Comprehensive Predictor Exams

A client expresses concern that her 2-hour-old newborn is sleepy and difficult to awaken. The nurse explains that this behavior indicates:

Correct Answer is A

Explanation

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Correct Answer is B

Explanation

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