THEY HAVE GILLS, TAILS AND FUR: Don't worry, your baby isn't an alien. However, at some point your little one did develop gill slits (properly known as pharyngeal arches) in its neck while in the womb, which then developed into the jaw and ear bones (our ear openings are the last remaining remnants of those gill slits). Around the same time, at about four weeks gestation, a tail can also be seen, which then gradually recedes and forms what is commonly known as the tailbone (coccyx). The fur however, known as lanugo, is something you may see when your baby is first born. This fine, downy hair covers the whole of a baby's body in the womb, and provides insulation as babies have little in the way of fat reserves. It's quite common for babies to be born with remnants of this hair in patches on their body, but it usually disappears by itself within the first few weeks of life.
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