3 Weeks Pregnant

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Here's what's happening during Week 3 of your pregnancy:

3-weeks-pregnant

Your Growing Baby

Fertilization occurs in one of the fallopian tubes. Cell division begins at breakneck speed.

Though it's very early in your pregnancy, things are definitely happening! Once the "winning" sperm (one of 200 million or so contenders) has penetrated your egg, the egg shuts down, admitting no more sperm. Two sets of cell nuclei fuse together inside the egg, assigning your baby—now called a zygote—a gender, eye and hair color and more than 200 other genetically determined characteristics.

Your Growing Belly

Be sure that you're taking good care of your baby. Now, if not before you started trying to conceive, you should:
Quit smoking.
Avoid alcohol.
Avoid drugs: the legal, the illegal, and those labeled "herbal supplements," and those that come as skin creams (such as acne medication) and in beverages (like caffeine).
Immediately tell your care provider about any prescription or other medications you currently take or were taking at the time you conceived.
Avoid taking large amounts of vitamins: an over-the-counter prenatal or even daily chewable (like a Flintstone) is enough and is recommended for all women who are trying to conceive or who could possibly become pregnant.
If you have any kind of medical appointment with a doctor or dentist, inform them that you may be pregnant.
Eat five servings of different fruits and vegetables daily.
Drink plenty of water.

Tips & To-Do's

Does Age Matter?

Ask several women what they think is the ideal age for pregnancy, and you’ll get wildly different answers. "Everything depends on the woman’s health, energy, personality and perspective on life.” While you can’t change your age, there are steps you can take to boost your odds of having a happy and healthy experience, no matter how old you are. Here’s what you need to know >>

Things to think about this week

If you haven't started already, you should be taking a prenatal multivitamin with 400 micrograms of folic acid daily (take 600 micrograms when you get pregnant).

Here’s expert advice to help you choose a good one >>

Featured Video

Pregnancy Milestones:

Below are some of the most important milestones of your pregnancy. Click on any week to read more, or view our Week-by-Week Pregnancy page to see your pregnancy at-a-glance.

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Week 4: Positive test: You're pregnant! You may be starting to feel bloated, crampy, tired and moody, and experiencing sore breasts, nausea/vomiting and a frequent need to pee.  But don't worry if you're not—that's normal.  Read more about being 4 weeks pregnant.

 

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Week 8: Your doctor may look or listen for the baby's heartbeat with an ultrasound. Once you see or hear it, your miscarriage risk drops to about 2 percent. He'll also give you an official due date—though very few women actually deliver on that day.  Read more about being 8 weeks pregnant.

 

 

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Week 10: Your inch-long baby is now called a fetus. While the icky side effects of pregnancy may be starting to abate, your anxiety about having a healthy baby might be increasing.  Read more about being 10 weeks pregnant.

 

 

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Week 15: The "window of opportunity" for many important screening and diagnostic tests opens this week, should you decide to undergo them.  Read more about being 15 weeks pregnant.

 

 

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Week 16: Sometime between 16 and 22 weeks, you'll start to feel your baby move.  Read more about being 16 weeks pregnant.

 

 

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Week 29: The basketball-sized lump in your belly may be inhibiting shoe tying, leg shaving and the like. The fetus is increasingly sensitive to light and sound.  Read more about being 29 weeks pregnant.

 

 

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Week 36: The baby may drop lower into your pelvis in preparation for delivery. This should make it easier to breathe—yet your pee breaks will become ever more frequent.  Read more about being 36 weeks pregnant.

 

 

Click here to read more about every week of pregnancy on our Week-by-Week Pregnancy page.