re already hard at work, beating to their own drummer (it will be weeks before those beats become coordinated). When those tubes fuse together,
your baby will have a fully functioning heart.
Day 22: heart begins to beat with the child's own blood, often a different type than the mothers'.
Week 3: By the end of third week the child's backbone spinal column and nervous system are forming. The liver, kidneys and intestines begin to take shape.