The lanugo begins to disappear, until it is gone except on the upper arms and shoulders.
From the en.wikipedia.org
Pups are born with a white, wooly coat called lanugo that provides insulation as long as it stays dry.
From the thenewstribune.com
My son only weighed 7 pounds and still had lanugo, which made me suspect that he wasn't done cooking, so to speak.
From the healthland.time.com
They are susceptible to temperature stresses until they grow a blubber layer and shed their lanugo, the white, wooly coat they're born with.
From the thenewstribune.com
Health complications associated with fast-induced starvation include electrolyte imbalances, thinning hair, lanugo, cardiac arrhythmia and renal failure.
From the en.wikipedia.org
More examples
The fine downy hair covering a human fetus; normally shed during the ninth month of gestation
Lanugo is fine, downy hair; it is a type of pelage. Often found in Teratomas.
Soft down or fine hair, specifically as covering the human foetus
Soft, downy hair on a baby's body.
Fine long hairs covering the fetus. It usually disappears one month after birth. Its reappearance during adult life has sometimes been associated with malignancies. It is soft, fine and usually unpigmented.
Fine hairs present on the body of a fetus.
The fine, downy hair that often covers the shoulders, back, forehead, and cheeks of a prematurely born newborn. Lanugo is replaced by more normal appearing hair toward the end of gestation.
The thick fur of a pinniped shed after birth
Thin and closely spaced hairs which are the first hairs in the human embryo. This type of hair is usually shed before birth and is replaced by the short and silky vellus.