Pregnancy Trimester

Stages of Pregnancy

Monday, April 19, 2010
By Obstetrics.com

Pregnancy lasts about 40 weeks, counting from the first day of your last normal period. The weeks are grouped into three trimesters (TREYE-mess-turs). Find out what’s happening with you and your baby in these three stages. First Trimester (Week 1-Week 12) During the first trimester your body undergoes many changes. Hormonal changes affect almost... »