Week 13 - Your First Trimester, Week-by-Week | Fit Pregnancy - Fit Pregnancy

Your First Trimester, Week-by-Week

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Week 12:  Your uterus has begun to expand outside the protective pelvic bones. It will increase in size by almost 1,000 times by the end of your pregnancy! You may really be starting to show now, especially if it's not your first baby.

What to do now:
•  From now on, steer clear of any activities that pose the risk of a fall or abdominal trauma, such as horseback riding. Also avoid exercises that require you to lie flat on your back—your growing fetus can place too much weight on a major vein, causing reduced blood flow to the uterus.

Read more about being 12 weeks pregnant.

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From the stressful (prenatal tests! gaining weight!) to the sheer fun (buying maternity clothes! your baby shower!), growing a baby involves a seemingly endless host of developments to expect, plan and accomplish. Our step-by-step timeline and checklist will help you navigate your pregnancy with as little stress and guesswork as possible. So grab your pencil, put your feet up and simply gestate!

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