Pregnancy Week by Week: Development, Symptoms and Milestones

Follow your baby's development from conception to birth. Select a week to learn what's happening with you and your baby.

First Trimester · Weeks 1–12

1 2 3 4 5 6 7 8 9 10 11 12

Second Trimester · Weeks 13–27

13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

Third Trimester · Weeks 28–42

28 29 30 31 32 33 34 35 36 37 38 39 40 41 42