Your First Trimester, Week-by-Week

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Week 5

Though the embryo is only about the size of a grain of sand, the heart is pumping blood, most other organs have begun to develop, and arm and leg buds appear. You may be starting to experience "pregnancy brain".

What to do now:

If it helps, make lists at work and at home to help your fuzzy brain function.

Make an appointment with your OB or midwife. Most caregivers want to see you for the first time between six and 10 weeks.

Read more about being 5 weeks pregnant.

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!