A nurse is assisting a client with breastfeeding her newborn. The nurse should explain that which of the following reflexes will initiate sucking?

Rooting. Choice A rationale:

The Moro reflex is a startle reflex characterized by the infant's sudden extension and abduction of the arms in response to a loud noise or sudden movement. It is not involved in the initiation of sucking and is unrelated to breastfeeding.

Choice B rationale:

The rooting reflex is a crucial reflex that helps initiate sucking in newborns. When the infant's cheek is stroked or touched, they will turn their head toward the stimulus and open their mouth, preparing for feeding. This reflex helps the infant find the mother's nipple and begin breastfeeding effectively.

Choice C rationale:

The stepping reflex is a primitive reflex observed in newborns when held upright with their feet touching a solid surface. The baby will make stepping movements, mimicking walking. However, this reflex is not related to the initiation of sucking and breastfeeding.

Choice D rationale:

The Babinski reflex is a reflex in which the big toe extends upward and the other toes fan out when the sole of the foot is stimulated. This reflex is present in newborns and disappears as the child grows older. It is not involved in the initiation of sucking.

Choice A rationale:

(Incorrect) The newborn with significant bruising from a face presentation is at an increased risk of elevated unconjugated bilirubin levels. Bruising can lead to the breakdown of red blood cells, increasing bilirubin production.

Choice B rationale:

(Incorrect) The premature newborn is at a higher risk of elevated unconjugated bilirubin levels. Premature infants often have an underdeveloped liver, which can lead to reduced bilirubin processing and clearance.

Choice C rationale:

(Correct) The baby born at 41 weeks' gestation is at the lowest risk for elevated unconjugated bilirubin levels. By this stage, the baby's liver is more mature, allowing for efficient processing and clearance of bilirubin.

Choice D rationale:

(Incorrect) The newborn with O+ blood type, born to a mother with O- blood type, is at an increased risk of elevated unconjugated bilirubin levels if the baby's blood type is Rh-positive and the mother's is Rh-negative. This situation can lead to Rh incompatibility and hemolytic disease of the newborn, causing higher bilirubin levels.