OverviewThe first trimester of a pregnancy is a time of incredible growth and development. A 7-week fetus will have begun to develop all essential organs.
Review Date 5/10/2017
Updated by: Anita Sit, MD, Department of OB/GYN, Santa Clara Valley Medical Center, San Jose, CA (for identification purposes only). Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.