Everything about Lanugo totally explained
» For the wasp genus, see Lanugo (wasp)
Lanugo is
hair that grows on the
body in an attempt to insulate the skin because of lack of
fat. It is a type of
pelage. Lanugo is very fine, and may grow densely on the body in places where significant amounts of hair doesn't normally grow. It occurs on
fetuses as a normal part of
gestation, but is usually shed and replaced by
vellus hair at about 40 weeks of
gestational age.
As the lanugo is shed from the skin, it's normal for the developing fetus to consume the hair with the fluid, since it drinks from the
amniotic fluid and urinates it back into its environment. Subsequently, the lanugo contributes to the newborn baby's
meconium. The presence of lanugo in newborns is a sign of
premature birth.
Lanugo is also common on other animals. For example, seals and elephants are often born with a covering of lanugo.
Lanugo is also a common symptom of serious
anorexia nervosa, as the body attempts to insulate itself when body fat is lost.
Further Information
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