A mother asks whether or not she should be concerned that her baby never opens his mouth to breathe when his nose is so small. Which of the following is the nurse's best response?

A) "Babies usually breathe in and out through their noses so they can feed without choking.":
Newborns are obligate nasal breathers, meaning they primarily breathe through their noses rather than their mouths, which helps coordinate breathing with feeding. This nasal breathing mechanism helps prevent aspiration and ensures that babies can feed while still breathing. It is perfectly normal for a baby to primarily use their nose for breathing, especially in the early days of life, and no cause for concern should be raised about small nasal openings unless the baby is showing signs of respiratory distress.

B) "You are right. I will report the baby's small nasal openings to the pediatrician right away.":
A small nasal opening is common in newborns and is not usually a cause for alarm unless it interferes with breathing, feeding, or shows signs of a more significant anatomical issue. There is no immediate need to report it unless the baby is having trouble breathing or feeding. The nurse should offer reassurance instead.

C) "Everything about babies is small. It truly is amazing how everything works so well.":
While this response may seem comforting, it is not very informative. It dismisses the mother’s concern rather than providing a clear and educational explanation. Reassuring the mother with factual information about why babies breathe through their noses and how this works effectively for them would be more helpful.

D) "The baby does rarely open his mouth but you can see that he isn't in any distress.":
This response minimizes the importance of the mother’s question and doesn’t fully address her concern. While it’s true that babies rarely open their mouths to breathe, the explanation needs to focus on the physiological reasoning behind it. The nurse should also reassure the mother that nasal breathing is normal in newborns and not typically a concern unless signs of distress are present.

A) Developing Prolactin Receptor Sites:
The first 1-5 days postpartum are critical for breastfeeding success because this period is when the prolactin receptor sites in the mother's breast tissue are being established. Prolactin is the hormone responsible for milk production, and the more prolactin receptor sites developed, the more efficiently the body can respond to the baby’s sucking and produce milk. This is the foundation for a successful breastfeeding relationship, as proper stimulation in these early days encourages the long-term supply of milk.

B) Decreasing Oxytocin:
Oxytocin is the hormone responsible for milk ejection (let-down) and is crucial for breastfeeding. In the early postpartum period, oxytocin levels are actually high and remain important for milk release, not decreasing. A decrease in oxytocin would impair milk ejection, which could affect breastfeeding success.

C) Decreasing Estrogen:
Estrogen levels drop significantly after delivery, which is part of the process that allows milk production to take precedence over pregnancy-related hormones. However, the drop in estrogen is more of a secondary event in breastfeeding success compared to the development of prolactin receptor sites. Estrogen primarily impacts lactation later, such as with the onset of menstruation.

D) Increasing Estrogen:
Estrogen levels rise during pregnancy, but they begin to decrease rapidly after birth. Higher levels of estrogen inhibit lactation during pregnancy, which is why the postpartum drop in estrogen is important for milk production to commence. However, an increase in estrogen would actually hinder the initiation of lactation and is not a factor in the success of breastfeeding in the early postpartum period.