A dramatic growth period for the fetus. HEAD Fetus has phases of sleep and waking and may prefer a favorite sleep position. Temporary hair called lanugo appears on the head. Lanugo may fall out in the second week after birth, allowing fine scalp hair to grow.
Eyebrows begin to form.
Ovaries of female fetuses contain primitive egg cells, all of the eggs a woman will have for her entire life. The uterus of female fetuses is also fully formed.