A nurse is collecting data from an infant who has Hirschsprung's disease. Which of the following manifestations should the nurse expect?

Birth weight has doubled.

Choice A reason:

The nurse should not expect a positive Babinski sign in a 4-year-old child during a well-child visit. The Babinski sign is a reflex seen in infants up to about 1 year of age and disappears as the nervous system matures. Its presence in a 4-year-old would be abnormal and may indicate neurological issues.

Choice B reason:

The nurse should not expect birth height to double in a 4-year-old child during a well-child visit. While children do experience significant growth in their early years, it is unlikely that birth height will have doubled by the age of 4. Doubling of birth height would be an atypical finding.

Choice C reason:

The correct choice. The nurse should expect that the child's birth weight has doubled during a well-child visit. From birth to age 4, children typically experience substantial weight gain, and doubling of birth weight is a common milestone in healthy development.

Choice D reason:

The nurse should not expect the presence of permanent teeth in a 4-year-old child during a well-child visit. Permanent teeth typically begin to emerge around 6 years of age and continue to erupt over the following years. The appearance of permanent teeth at age 4 would be premature and unusual.

Choice A reason: The correct answer is choice A. The nurse should expect the presence of the Moro reflex in a 6-month-old infant. The Moro reflex is a normal primitive reflex seen in infants up to about 6 months of age. When the infant experiences a sudden loss of support or a loud noise, they react by extending their arms and legs and then pulling them back in, as if trying to grasp onto something. This reflex is an important indicator of the baby's neurological development.

Choice B reason:

The birth weight doubling by 6 months of age is a typical growth milestone for infants. However, this statement is not correct in the context of the question, as it is not something the nurse should "expect” during a well-child visit. Instead, it is a general developmental milestone that healthcare providers monitor over time.

Choice C reason:

The correct answer is choice C. The nurse should expect the posterior fontanel to be closed in a 6-month-old infant. Fontanels are soft spots on a baby's skull that allow for brain growth during early development. The posterior fontanel, located at the back of the head, is typically closed by 6 months of age.

Choice D reason:

The correct answer is choice D. At 6 months of age, many infants can sit unsupported. However, not all infants achieve this milestone at the exact same age. Some may achieve it a bit earlier, while others might take a little more time. It is essential for the nurse to assess the infant's developmental progress and provide appropriate guidance to the parents.

Choice E:

The correct answer is choice E. By 6 months of age, some infants may be able to move from their back to their front. This is usually accomplished through rolling over. However, like other developmental milestones, the age at which infants achieve this can vary. Therefore, while the nurse may expect this ability in some infants, it is not something that all 6-month- old infants will have mastered at the time of the well-child visit.