In fact, your baby's hair journey begins in the second trimester, when a fine hair called lanugo develops. Lanugo is the soft hair that forms on your baby's body around week 21. Lanugo helps ...

She explained that their white fur, known as lanugo, serves as an effective insulator during this critical early stage of life. “That’s a very late-stage pup, but he still has the lanugo on ...