How your baby's growing:This week, your baby measures over 16 inches long. He weighs about 3.3 pounds (try carrying four navel oranges) and is heading into a growth spurt. 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.
See what your baby looks like this week.
Note: Every baby develops a little differently — even in the womb. Our information is designed to give you a general idea of your baby's development.
How your life's changing:
If you're having a boy, you and your partner will want to take some time to think about whether or not to have your baby circumcised. Find out the pros and cons from your doctor, and what the procedure involves.