-
1 CE
Week 1
The circulatory system is beginning to form, and the tiny "heart" will start to beat this week. -
2
Week 2
Your baby's nose, mouth and ears are starting to take shape, and the intestines and brain are beginning to develop. -
3
Week 3
Little hands and feet that look more like paddles are emerging from the developing arms and legs. -
4
Week 4
Nerve cells are branching out, forming primitive neural pathways. Breathing tubes now extend from his throat to his developing lungs.
