"These soft spots are called fontanels. Typically, the one towards the front of the head closes between 12 and 18 months, and the one on the back of the head closes by 2-3 months old."

"These soft spots are called fontanels. The one towards the front of the head closes at two months, and the one on the back closes at 12 to 18 months old."

"These soft spots are called fontanels. The one on the front of the head closes between 12 and 18 months, and the one on the back closes around 6 months old."

"These soft spots are called fontanels. The one on the front of the head closes at 9 months old, and the one on the back closes at 2 months old."