Week 2: By 2 or 2 1/2 weeks, the formation of 3 tissues called ectoderm, endoderm and mesoderm give rise to numerous structures that will later develop! These include the brain, spinal cord, the liver, pancreas, the heart, blood cells and more structures. Stay tuned…by week 3, the heart begins to beat. #40weeks40facts
Please share with your friends to help inform the public just how beautiful life is (especially pregnant friends who would like to know about the development of their baby!).