3 Weeks Pregnant: Pregnancy Week by Week

At 3 weeks, your baby is a ball of cells implanting in your uterus. See BabyCenter's week-by-week guide to pregnancy.

Follow our pregnancy week-by-week calendar guide to understand how big your baby is at each week of gestation (compared to the size of a

3 Weeks Pregnant - Symptoms & Baby Development

3 Weeks Pregnant - Pregnancy Week by Week