Although you won’t be able to hear it yet with any device, at some time this week the baby’s heart will start beating, and will continue to do so throughout its life. This means that your baby’s heart has a circulatory system that is functioning. His heart already has four chambers to be able to distribute blood properly to its small structures.

Other basic organs as the brain or lungs are growing. The umbilical cord by which it is attached to you throughout the pregnancy is also forming. Small bud-like protrusions on the sides of its body are forming and these are the beginning of its arms and legs. Right now he looks like a small bean made up of millions of cells organized in several layers.