Baby kneecaps don't show up in x-rays, but your baby does have kneecaps.
All bones of babies start off as cartilage, and they harden or ossify, over time. Kneecaps take an especially long time to form (from three to five years) and because cartilage doesn't show up on X-rays, babies appear to have no kneecaps.
A baby cannot taste salt until it is 4 months old.
A baby could hear your voice and other sounds from about 23 weeks of pregnancy.
From birth to toilet training, a baby goes through an average of 7000 diaper changes.
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