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 ne
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