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

3.5 week fetus

3.5 week fetus

Overview

At 3.5 weeks the fetus:

  • will have formed the heart
  • begins development of the brain and spinal cord
  • starts forming the gastrointestinal tract

Update Date 9/30/2013