Pregnancy Week 3

Find out how your baby is developing in week three and learn the early signs of pregnancy, along with the importance of choosing the right doctor.

Watch Your Baby's Growth

Sperm Meets Egg: Weeks 1 to 3 of Pregnancy
Sperm Meets Egg: Weeks 1 to 3 of Pregnancy

Something magical is about to happen! Watch as the ovulation process occurs, and then millions of sperm swim upstream on a quest to fertilize an egg.

Your Changing Body

You may experience spotting this week when your egg implants itself into the uterine wall. This will be lighter than a normal period and is actually one of the first signs of pregnancy.

Your Developing Baby

Your baby's appearance, sex, and even some of his or her personality and intelligence are determined at fertilization.

Your Pregnancy

When a speedy, strong sperm swims its way up the cervix to fertilize the egg and combine genetic material, that's when you're officially pregnant. But you might not be expecting--because you probably have no idea yet that you're about to become a mama!

Your Week 3 To-Do List

1. Look for the early signs of pregnancy.

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!

Ask Parents About Week 3

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

See All Questions or Ask Your Own

Everything in Pregnancy Week 3

More About Your Pregnancy in Week 3

Your Baby

Your Body

Your Self

  • Avoiding Workplace Hazards

    Is your workplace safe for you and your growing baby? Here's what you should look for and be sure to avoid.

  • Sex During Pregnancy

    Your sex life will likely ebb and flow during pregnancy. Be sure to be both respectful of your partner and vocal of your own needs and ...

Diet & Exercise

  • The Role of Calcium

    Calcium is an important part of your growing baby's health. Here's why you should be sure you're making it a part of your early-pregnan...

  • Relieving Morning Sickness

    Don't skip out on your exercise regime! Try to get moving, even if your tummy doesn't agree.

  • The Importance of Folic Acid

    Are you taking folic acid? If not -- be sure to start now. Here's why.

Q & A