A nurse is collecting data from an infant at a well-child visit.
The nurse should expect the infant to double his birth weight by which of the following ages?

Choice A rationale

At 10 months, it is normal for an infant to not be able to recognize objects by name. Language development varies greatly among children, and many do not start to understand and respond to simple requests and recognize common objects until around 12 months.

Choice B rationale

The ability to turn pages in a book is a fine motor skill that typically develops around 12 to 18 months. Therefore, it is normal for a 10-month-old infant to not have this ability.

Choice C rationale

Peek-a-boo is a common game that many infants enjoy. However, not all infants may show interest in this game. Lack of interest in peek-a-boo is not necessarily a cause for concern.

Choice D rationale

By 10 months, most infants can sit without support. If a 10-month-old infant does not sit steadily without support, it could indicate a delay in motor development and should be reported to the provider.

Choice A rationale

While rest is important for a child, suggesting that the child needs to rest does not address the parents’ concern about their child crying when they leave.

Choice B rationale

This is the correct answer. It is normal for an 8-month-old child to show signs of separation anxiety when their parents leave. This is a part of their normal development where they start to understand object permanence - the concept that things and people exist even when they’re out of sight. This can make them upset when their parents leave as they understand their parents are somewhere else, but they don’t know when they’ll return.

Choice C rationale

Notifying the provider about a normal developmental behavior is not necessary. It’s important for parents to understand that this behavior is a normal part of their child’s development.

Choice D rationale

While an overstimulating environment can cause distress in children, in this case, the child is upset because of their parents leaving, not because of the environment.