The mother of a 16-week-old infant calls the clinic, concerned because she cannot feel the posterior fontanelle on her infant. Which response by the nurse would be most appropriate?
1. "It is normal for the posterior fontanelle to close by 8–12 weeks after birth."
2. "Bring your infant to the clinic immediately."
3. "This is due to overriding of the cranial bones during labor."
4. "Your baby must be dehydrated."
1
Rationale 1: This is a normal finding at 16 weeks. The posterior fontanelle closes within 8–12 weeks.
Rationale 2: There is no reason to bring the infant to the clinic.
Rationale 3: Overriding of the cranial bones is referred to as molding, and diminishes within a few days following birth.
Rationale 4: Fontanelles can be depressed when the infant is dehydrated.
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