The fetus develops waking/sleeping patterns. Real hair (not lanugo) begins to grow on the head. Length: about 12 inches; weight: 1 ¼ pounds. Fetus fact: If born now, your baby would have about a 50 percent chance of surviving. Fit Pregnancy, Baby Umbilical Cord, Trimester By Weeks, 24 Weeks Pregnant, 26 Weeks Pregnant, 28 Weeks Pregnant, Pregnancy Calendar, 32 Weeks Pregnant, Pregnancy Checklist