Embryology - The Second Week of Development

Question 1

What can be noted in the embryoblast during the beginning of days 11 and 12?

Answer 1

1. Orginal defect is covered by the surface epithelium
2. Synctium forms and intercommunication network

Question 2

What are the 4 events during the Decidua reaction during the 12th day of development?

Answer 2

1. Endometrial cells become polyhedral
2. load with glycogen and lipids
3. Intercellular spaces load with glycogen and lipids
4. Tissue is edematous

Question 3

Explain why there might be bleeding close to the 28th day despite implantation occurring.

Answer 3

Increased blood flow into the lacunar spaces. The surface defect usually heals but this might occur.