Embryology
Timing and Site of Implantation
Apposition
Adhesion
Invasion
Decidual Reaction of the Endometrium
Invasive Properties
Secretion of hCG
Epiblast
Hypoblast
Amniotic Cavity
Primary Yolk Sac
Secondary Yolk Sac
Chorionic Cavity
Origin and Development
Somatic Layer
Splanchnic Layer
Formation and Role
Future Umbilical Cord
Previous
3. First Week of Development
Go to top
Next
5. Third Week of Development