4 Weeks Pregnant

Here's what's happening during Week 4 of your pregnancy.

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Your Growing Baby:

The fertilized egg (known as a zygote) implants in the wall of the uterus; the placenta and umbilical cord begin to form.

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Your Growing Belly:

The fertilized egg burrowing into you uterus can make you shed a few spots of blood. Any pregnancy symptoms you have will be barely, if at all, noticeable. If you're very sensitive, you may notice feelings of fatigue, queasiness, bloating, and breast tenderness, and changes in your skin and hair. If you take a super-sensitive test, such as a blood test at your doctor's office, it's possible to get a positive result a week after conception. If you test at home this early, know that it's possible to get a false negative at this stage.

Tips & To-Do's:

Too Early To Test?

During the first few weeks, your body is working 24/7 behind the scenes to support the pregnancy, and fatigue is a normal response. When the fertilized egg implants into the plush lining of the uterus about six to 12 days after conception, spotting—light vaginal bleeding—may occur. Your breasts may be extra tender as early as a week or two after conception. Here are nine subtle clues that you might be pregnant.

Things to think about this week

Sure, what you eat during pregnancy is vital, but that doesn't mean you have to be afraid of everything you put in your mouth or force yourself to eat foods you don't like. Simply stick to these 10 basic do's and don'ts.

NEW:  Listen to Our Week-by-Week Podcast All About Your Pregnancy 

Each episode of the new Pregnancy Confidential podcast, hosted by our editors, walks listeners through the physical, emotional and all-round quirks of each week of pregnancy. This is real-talk, girlfriend-to-girlfriend stuff—no hard-to-understand medical information here—taking you through the real feelings of pregnancy so you're never alone. And it'll have you chuckling all along the way. All episodes available now!