Fetal Development

From a tiny cluster of cells to a bouncing baby - fetal development is an amazing process. Here you'll see pictures of how a fetus develops each week, and each trimester. Plus what's happening to your baby throughout the fetal development process.

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Quickening in Pregnancy: Feeling the First Fetal Kicks
Many moms-to-be wonder when they'll feel fetal movements for the first time. Here's your guide to understanding "quickening" during pregnancy.
Sleep Cycles: Weeks 26 to 30 of Pregnancy
At this point, your baby is awake and asleep at very specific times of the day. Find out about his sleep patterns, and what they mean.
The Inside Story: Your Baby in Weeks 1 Through 4
Your pregnancy has started -- even though you may not know it. Find out what's going on right now during your baby's very first weeks of life in utero.
Second Trimester Ultrasound Pictures
We've partnered with the American Institute of Ultrasound Medicine (AIUM), Johns Hopkins, and the March of Dimes to create this unique peak into Baby's development inside the womb. These images reveal all the intricate details of your baby's growth in the second trimester.
What Does a Baby Kick Feel Like?
Experts answer your top questions about your developing baby's movements, from when she'll start kicking to how often you should feel her kick.
Twins: A Closer Look at Your Developing Babies
Parents.com partnered with the American Institute of Ultrasound Medicine (AIUM) to create this unique peak into a baby's development inside the womb. These images reveal all the intricate details of a baby's growth -- from a collection of cells to a full-term newborn. While most women may only receive one or two ultrasounds during pregnancy, which is normal, this slideshow of the 3rd trimester of pregnancy gives you a look at each week of development.
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More Fetal Development

Week 29 Ultrasound: What It Would Look Like
Your baby at 29 weeks is stronger, more alert, and bigger than ever. Here's everything you can expect from an ultrasound at this stage in your pregnancy.
Week 30 Ultrasound: What It Would Look Like
Your baby is making new brain cell connections as your 30th week of pregnancy begins. Find out all the exciting new developments during this part of your journey.
Week 35 Ultrasound: What It Would Look Like

Now that you're 35 weeks pregnant, it's time to talk to your doctor about your baby's position. Plus, learn other fetal developments specific to this week of pregnancy!