Baby This Week: 3 Weeks Old

Every baby has a unique temperament. Some are placid and agreeable, while others are more sensitive. One thing all babies have in common is that they communicate with you by crying. Sometime in the first month, you'll begin to hear another kind of sound. That's when most babies find their voices. When your baby is calm and alert, you may notice she says a little "ooh" or "aah" when she sees you or hears you approaching.

Be sure you're continuing to put your baby down on her stomach for "tummy time" when she's awake. Babies should sleep on their back, but they also need to spend time on their belly every day to strengthen their neck muscles, which help them push up, roll over, sit up, and crawl. Tummy time will also help your baby avoid developing a flat spot on her head from being on her back.

By the end of this week, your baby may lift her head briefly and possibly move it from side to side when she's lying on her stomach. Try putting your face in front of your baby's to encourage her to hold up her head to look at you. You can also roll up a towel or receiving blanket and put it under her chest to help get her started with her push-ups. Soon, her nervous system and muscle control will mature and her jerky movements will become more fluid.

- BabyCenter.com

Mila at Three Weeks