Article: Are we born with fingernails? What are they made of? How do they grow?(Ask Doctor Cory)

Dear Adrienne:

Yes, we are born with fingernails. They begin to grow before birth at about ten weeks. By about thirty-two weeks, the fingernails can reach the fingertips.

Fingernails are made of keratin (CARE-uh-tin), a protein found in the outer layer of ...

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