https://www.ncbi.nlm.nih.gov/books/NBK542197/
Anatomy, Head and Neck: Fontanelles - StatPearls - NCBI Bookshelf
At birth, the newborn's skull consists of five major bones (two frontal, two parietal, and one occipital) that are separated by connective tissue junctions...
head and neckanatomyncbibookshelf
https://medlineplus.gov/ency/article/003311.htm
Fontanelles - enlarged: MedlinePlus Medical Encyclopedia
Enlarged fontanelles are larger than expected soft spots in the head for the age of a baby.
medlineplusmedicalencyclopedia
https://www.nyp.org/healthlibrary/definitions/soft-spots-fontanelles
Soft Spots (fontanelles) - Health Library | NewYork-Presbyterian
Babies normally are born with two soft spots (fontanelles) on their head: a large soft spot on the top and a small one on the back. The soft spots are areas...
soft spotshealth librarynewyorkpresbyterian