Stages of Pregnancy Week by Week

What My Baby Looks Like in Week 21

See how your baby is growing inside the womb in week 21. His development is progressing rapidly, yet he's still small enough to fit in the palm of your hand.

At about 12 ounces the developing fetus closely resembles a miniature version of a fully developed person, but is still able to fit in the palm of your hand. To stay warm your developing fetus is developing body fat and a thin layer of hair called lanugo. Your developing fetus now often hiccups as a means to practice breathing and swallows amniotic fluid in order to practice eating.
Illustrations Courtesy of the Sprout Pregnancy App

Illustrations Courtesy of the Sprout Pregnancy App

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An Inside Look

Take a unique look at Baby's development inside the womb this week.

Your Growing Belly

A month-by-month photo gallery of pregnancy.

Your Growing Baby

Your baby is as long as a carrot.

Your Pregnancy Week 21

Learn more about what's happening with your pregnancy this week including your baby's latest fetal development milestones, your changing body, and tips to help you along the way.

Share Your Pregnancy Photos

Take pictures of your pregnancy, and then post them here to share with family and friends.

Find the Perfect Baby Name

For the perfect baby girl or baby boy name, check out our fun resources. We've got great info on top name trends, unique baby name themes, insight into name origins and meanings, and more. Happy naming!

Checklist: Registry 101

Our print-and-shop registry checklist covers everything you need to dress, bathe, swaddle, entertain, and care for your baby.

Recall Finder

Is your baby gear safe? Find out here.

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