5 Weeks Pregnant

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Here's what's happening during Week 5 of your pregnancy:

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Your Growing Baby

The gastrointestinal tract, spinal cord, heart, brain, blood and blood vessels begin to form. The embryo is 1∕16 to 1∕8 inch long “crown to rump” (the measurement that’s used until week 13).

Your baby transforms into a bundle of cells organized in a C-shape with a top, bottom, front, and back. A groove has developed on the embryo's back, which will seal and develop into the neural tube (which later will become the spinal cord). At this point, the tube already has a wider, flatter top that will grow into your baby's brain. A bulge has developed in the center of the embryo, which will soon become a tiny U-Shaped tube which will form the heart. Your embryo is encased in protective membranes and attached to a yolk sac, which manufactures the embryo's unique blood cells.

Your Growing Belly

In a lot of ways, pregnancy is like standing at the edge of the Grand Canyon. On one hand, it’s the most breathtaking and majestic thing you’ve ever experienced. On the other, it’s a long way to the bottom—and you can’t help but feel a little anxious about taking a wrong step. Chances are everything will be just fine, and you should take comfort in the fact that statistics are in your favor. So we do want you to embrace the beautiful experience of pregnancy, but we also want you—as your child’s biological suit of armor—to do a few things that can help improve those odds. Keeping yourself healthy will protect both of you at the same time. Here are 11 tips from Mehmet Oz, M.D., and Michael Roizen, M.D. that will help you do just that >>

Tips & To-Do's

Stress Less

Many pregnant women fret too much about the wrong things, and pay too little attention to issues that can genuinely harm their pregnancy and baby. See how your concerns compare to other women’s, then learn whether or not your fears are well-founded and—the bottom line—what you can do to have a healthy and happy pregnancy. The truth about your top 10 pregnancy worries >>

Things to think about this week

Call your doctor for an appointment as soon as you believe you are pregnant. Some will want to see you right away, others not until you are eight weeks pregnant. What you need to do before baby, broken down by trimesters and weeks >>

 

 

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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.