A nurse is collecting data from a 4-month-old infant at a well-child visit. For which of the following findings should the nurse notify the provider?

Choice A Reason: Posterior fontanel closed is incorrect, it is normal for the posterior fontanel to close earlier than the anterior fontanel, usually by 2 to 3 months of age. Choice B Reason: Anterior fontanel closed is correct. The anterior fontanel is the soft spot on the top of a baby's head, and it typically closes between 12 to 18 months of age. If the anterior fontanel is closed in a 4-month-old infant, it is considered an early closure, which can be a cause for concern. Early closure of the anterior fontanel can be associated with various underlying medical conditions, such as craniosynostosis (premature fusion of the skull bones) or dehydration. Choice C Reason: Plays with toes is incorrect. At 4 months of age, infants are typically developing their motor skills, and playing with their toes is a sign of normal development. Choice D Reason: Moves objects to mouth is incorrect. At this age, infants often explore their environment by bringing objects to their mouths as part of their sensory exploration and development.