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Home › Featured Galleries › Your First Trimester, Week-by-Week
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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!

    Tags: first trimester, ovulation, pregnancy cravings, prenatal vitamins

    You May Also Like...

    • Week-by-Week Pregnancy
    • Your Second Trimester, Week-by-Week
    • Your Baby's First Year of Life
    • All About the First Trimester

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