Baby This Week: 31 weeks

This week, your baby measures over 16 inches long. She weighs about 3.3 pounds (try carrying four navel oranges) and is heading into a growth spurt. She can turn her head from side to side, and her arms, legs, and body are beginning to plump out as needed fat accumulates underneath her skin. She's probably moving a lot, too, so you may have trouble sleeping because your baby's kicks and somersaults keep you up. Take comfort: All this moving is a sign that your baby is active and healthy.