Week 10 During Week 10 of pregnancy, or 8 weeks after conception, all the vital organs are in place, along with fingers and toes. The genitals are forming and development of the skeleton is underway. The embryo's head is becoming rounder. The hands are beginning to touch the face and the hands and feet begin to touch each other. The end of this week marks a change from the embryonic to the fetal period of development; that is, the transition from an embryo to a fetus. The fetal stage lasts until birth.