The kneecap (or patella) is not present at birth. It starts as cartilage and gradually hardens into bone between the ages of 2 and 6 years old.
Babies are born with soft cartilage in place of the kneecap. This cartilage gradually transforms into bone through a process called ossification. This process is essential for the development of strong and sturdy bones that can support the body's weight and movement.
