Stages of Pregnancy Week by Week
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.
Watch Your Baby's Growth
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.
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
1. Missed your period? Take a pregnancy test.
An Inside Look
Take a unique look at Baby's development inside the womb this week.
Your Pregnancy Calendar
Organize your doctor's appointments, save your ultrasound photos, and more--all in one place!