Hello, hair. By the end of the week, your little one’s scalp hair pattern will be established for life. Some hair might begin to sprout, although it’s usually not evident for a few more weeks. Of course, this is no guarantee that your baby will be born with a full head of hair; some babies stay bald until several months after birth. Ultrafine, soft hair called lanugo is also appearing over your fetus’s entire body. This downy hair, which protects the delicate skin from the amniotic fluid, usually disappears just before or after birth.
Thin skinned. Underneath that lanugo is a fine layer of skin through which you can see blood vessels, which are already transporting blood. Mouth development continues—your little one may even be sucking on a thumb right now—and facial movements are a regular occurrence.
Measuring up. If you could peek inside your uterus, you’d see a tiny fetus that weighs anywhere from 1.7 to 2.5 ounces and measures 4.1 to 4.5 inches from crown to rump—about the size of a small grapefruit.
Thanks again to pampers for providing this information!