That soft, downy hair is called lanugo (pronounced “la-NOO-go”). It's produced by fetal hair follicles during the second trimester and keeps a baby warm inside the womb. Many babies lose their lanugo in utero (around 32 to 36 weeks), where it's shed into the amniotic fluid. My baby is 7 weeks old and has very hairy ears lol dose anyone else baby has hairy ears? Will it fall off eventually?Preemie baby born with hair on her ears.