URL of this page: //medlineplus.gov/ency/imagepages/9578.htm

Fetus at 3.5 weeks

Fetus at 3.5 weeks

Overview

At 3.5 weeks, the fetus will have formed the heart, begins development of the brain and spinal cord, and starts forming the gastrointestinal tract.

Review Date 9/26/2015

Updated by: Daniel N. Sacks MD, FACOG, obstetrics & gynecology in private practice, West Palm Beach, FL. Review Provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.