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Embryogenesis week 1,2,3, BLASTOCYST (Embryoblast differentiation in…

- - - - formation of
        Chorionic cavity
        
        formation of
        Secondary Yolk sac
      - formation of Connecting stalk future umbilical cord
- - - - Neural plate grow and invaginate start forming neural fold and groove
    - - paraxial mesoderm form longitudinal columns and organizes in segments: somitomeres
- - - - tertiary villus connecting placenta and embryo
- - - - ZYGOTE
        
        Ampulla
        
        Blastomere
        
        MORULA 16 cells
        
        BLASTOCYST
        
        Uterine cavity
        
        Zona pellucida disappears
        
        Implantation begins
        
        Implantation on compact layer of endometrium during progestational (secretory) phase
        
        Fallopian tube