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.

Most Recent

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.
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An Embryo Forms: Weeks 4 to 8 of Pregnancy

Chances are you have no idea you're pregnant yet-€”but your body is already hard at work. Watch as the egg undergoes its wondrous transformation to embryo.
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Developing Senses: Weeks 22 to 25 of Pregnancy

Your baby's ability to see, hear, smell, taste, and feel are developing stronger each day. Learn which of her senses are already working.
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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.
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Second Trimester Begins: Weeks 13 to 17 of Pregnancy

Here's to hoping you're no longer feeling nauseated or exhausted! Right now your baby's brain and eyes are making dramatic strides each day. Learn all about it.
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More Fetal Development

First Trimester Ultrasound Pictures

Do you know what to expect at your first trimester ultrasound? 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 during the first few weeks of life. 
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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.
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This NFL Star and His Wife Had a Prenatal Testing Scare—Now They're Talking About It

成人小视频appPro football star Torrey Smith, whose wife is pregnant with baby #2, wrote an honest blog post about their anxiety-inducing prenatal test results.