1. Overview of developmental events, processes and anomalies timeline: The prenatal time scale (months) the first and second weeks
2. Early embryonic development and the placenta adult uterus, ovaries, and uterine tube
3. The nervous system formation of the neural plate
4. The cardiovascular system early vascular systems
5. The respiratory system early primordia formation of the pleural cavities visceral and parietal pleura development of the diaphragm
6. The gastrointestinal system and abdominal wall formation of the gut tube and mesenteries foregut, midgut, and hindgut
7. The urogenital system early primordia division of the cloaca
8. The musculoskeletal system myotomes, dermatomes, and sclerotomes muscle and vertebral column segmentation mesenchymal primordia at five and six weeks
9. Head and neck ectoderm, endoderm and mesoderm
2. Early embryonic development and the placenta adult uterus, ovaries, and uterine tube
3. The nervous system formation of the neural plate
4. The cardiovascular system early vascular systems
5. The respiratory system early primordia formation of the pleural cavities visceral and parietal pleura development of the diaphragm
6. The gastrointestinal system and abdominal wall formation of the gut tube and mesenteries foregut, midgut, and hindgut
7. The urogenital system early primordia division of the cloaca
8. The musculoskeletal system myotomes, dermatomes, and sclerotomes muscle and vertebral column segmentation mesenchymal primordia at five and six weeks
9. Head and neck ectoderm, endoderm and mesoderm