31 Weeks (a little late since we're almost 32 weeks)

This week, your baby measures over 17 inches long. He weighs about 4 pounds (try carrying four navel oranges) and is heading into a growth spurt. The heavy news: you can expect your miracle-gro muffin to gain about a half a pound of weight per week from now until about two weeks before birth. He can turn his head from side to side, and his arms, legs, and body are beginning to plump out as needed fat accumulates underneath his skin. He'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.