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MedTerms Medical Dictionary |
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Lanugo: Downy hair on the body of the fetus and newborn baby. It is the first hair to be produced by the fetal hair follicles, usually appearing on the fetus at about five months of gestation. It is very fine, soft, and usually unpigmented. Although lanugo is normally shed before birth around seven or eight months of gestation, it is sometimes present at birth. This is not a cause for concern: lanugo will disappear within a few days or weeks of its own accord. "Lanugo" is the Latin word for down, like the fine small hairs of plants. |
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