Gametogenesis. Ovary cycle and menstrual cycle. Fertilization: modifications of the gametes; histophysiology of fertilization; zygote and cell differentiation.
First week of development: segmentation; morula; blastocyst; embryoblast and trophoblast.
2nd week of development: implantation; bilaminar disk; evolution of the trophoblast.
3rd week of development: notochord; formation of the three germ layers (ectoderm, mesoderm, endoderm); definition of body shape and body axes.
4th week of development: development and derivatives of the ectoderm (neural tube and encephalic vesicles, stomodea); development and derivatives of the mesoderm (paraxial, intermediate and lateral mesoderm, somites, mesenchyme); development and derivatives of the endoderm (primitive intestine, anterior gut and pharyngeal intestine: furrows, arches and gill pouches).