01- Fertilization
02- Cleavage and blastocyst formation
03- Implantation
04- Gastrulation
05- Folding of the embryo
06- Development of body cavity
07- Pharyngeal arches, tongue, thymus, and thyroid
08- The development of the face and palate
09- Respiratory development
10- The development of the gastrointestinal tract
11- The development of the reproductive system
12- The development of the urinary tract
13- The development of the heart
14- The development of the vascular system
15- The development of the nervous system
