In the course of prenatal development, by the end of the period, the heart begins to beat, the arms and legs become more differentiated, the face starts to form, and the intestinal tract appears in human beings. germinal fetal conception embryonic

This is the embryonic period. From week three to the eight week. Cell differentiation intensifies, support systems develop, and the beginnings of organs appear. The neural tube starts to take shape. By the end of this period, the heart begins to beat, the arms and legs become more differentiated, the face begins to form, and the intestinal tract also appears.