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Pregnancy

Week 37

This week, your baby continues to gain weight — at half an ounce a day!

Week 38

At this point, you may be taking frequent trips to the bathroom. That's because your baby is engaged in your pelvis, so your bladder is extremely compressed.

Week 39

Braxton Hicks contractions (also called "false labor") may become more pronounced, and your water may break.

Week 4

During this week, your baby, or embryo, has two layers of cells that will develop into organs and body parts.

Week 40

Your baby is here! Or maybe not — most women, especially first-time moms, don't deliver on their estimated due dates.

Week 5

This week, the embryo begins to form a distinct shape that includes the neural tube, which will become the spinal cord and brain.

Week 6

Your baby's heart will begin to beat around this time, and the beginnings of the digestive and respiratory systems are forming, as are small buds that will grow into arms and legs.

Week 7

The umbilical cord has formed, and the mouth, nostrils, ears, and eyes are some of the facial features that become more defined this week. The arm bud now has a hand on the end of it, which looks like a tiny paddle.

Week 8

Around this time, symptoms such as a missed period, nausea, extreme fatigue, or tight clothes may make the reality of pregnancy hit home.

Week 9

Your baby measures about 0.6 to 0.7 inches from crown to rump and weighs around 0.1 ounces. Your baby may make some first movements as muscles develop, but you won't feel them for several more weeks.