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Babies are born without kneecaps. They don't appear until the child reaches 2 to 6 years of age.

(4) Comments
okay, what the hell is up with everyone being so critical on this site? for everyone writing well thought out explainations to prove someone wrong on every single one of these is stupid.
Actually, "kneecap" isn't the name of the bone. It's "patella." Get a clue.
I hope you realize you just proved yourself wrong. Ossification is the process of cartilage turning to bone. Kneecap is the name of a bone, not a name of cartilage. So the cartilage is present at 4 months, not the bone.
Another load of crap.. Newborns do have kneecaps which form about the fourth month of fetal life. However, they don’t show up on x-ray very well because they’re not ossified, or bony -

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