Posterior Fontanelle Closure Age

The fontanel can enlarge in the first few months of life 18 and the median age of closure is 13 8 months.

Posterior fontanelle closure age. It may already be closed at birth. The posterior fontanelle is on the upper rear part of the baby s head. The fontanelle in the back of the head posterior fontanelle most often closes by the time an infant is 1 to 2 months old.

The posterior fontanelle generally closes between 6 weeks and 3 months after birth. By three months of age the anterior fontanel is closed in 1 percent of infants. If fontanels close too early or too late that may be a sign of a problem.

The posterior fontanel closes first at latest by the age of 8 weeks in a full term baby. The sutures and fontanelles are needed for the infant s brain growth and development. The posterior fontanelle generally closes 2 months after birth and the anterior fontanelle by 2 years of age in almost all infants 4.

1 posterior fontanelle generally closes 2 3 months after birth 2 sphenoidal fontanelle is the next to close around 6 months after birth 3 mastoid fontanelle closes next from 6 18 months after birth and 4 the anterior fontanelle is generally the last to close between 1 3 years. The fontanelles should feel firm and very slightly curved inward to the touch. During childbirth the flexibility of the sutures allows the bones to overlap so.

There are two sphenoid fontanelles on either side of the. The anterior fontanel closes at 18 months of age on the average but it can close normally as early as 9 months. In humans the sequence of fontanelle closure is as follows.

This fontanelle is at the intersection of three different bones. The posterior fontanelle is located between the pair of parietal bones and the occipital bone. Other than the anterior and posterior fontanelles the mastoid fontanelle and the sphenoidal fontanelle are also significant.