Here's a breakdown of the stages:

* Embryo: The stage of development from fertilization to the end of the eighth week of pregnancy. During this time, the major organs and body systems begin to form.

* Fetus: The stage of development from the ninth week of pregnancy until birth. During this time, the fetus continues to grow and develop, and its organs become fully functional.

Therefore, the embryo is the very beginning of a new human life, and it eventually develops into a fetus and then a baby.