Pregnancy Week 4

Discover your baby's latest fetal developments in week four of your pregnancy and get tips on sharing the exciting news with your friends and family.

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Your Changing Body

You just missed your period and the test came back positive -- that's right, you're pregnant! Can't bear to fasten your bra in the morning? For most women, breast tenderness is the first physical sign of pregnancy -- even before telltale morning sickness strikes.


Your Developing Baby

So what's going on in your womb this week? Your embryo may be minuscule, but trust us: Super-important developments are already under way. This week the embryo splits into two parts. One half will become the placenta, a special tissue that delivers must-have nutrients and oxygen to your baby throughout your entire pregnancy.


Tip of the Week

Don't be surprised if your doctor doesn't schedule an appointment to see you until your 8- to 12-week mark. Many healthcare practices have potential mommies-to-be come in for a blood test with a nurse first to confirm pregnancy.


Your Week 4 To-Do List
woman holding pregnancy test

1. Missed your period? Take a pregnancy test.


An Inside Look
Week 4

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


Your Pregnancy Calendar
Pregnant woman crossing off the days until the birth

Share and celebrate your pregnancy with other moms-to-be.


Ask Parents About Week 4

We've got answers to your questions from experts and parents who've been there.



See All Questions or Ask Your Own »
More About Your Pregnancy in Week 4
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Your Body
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