IMPLANTATION

 Implantation occur in the endometrium of the ant or post wall of the body near the fundus.

⦁ The process is completed by 10th or 11th days of fertilization

STAGE OF IMPLANTATION:-

Apposition

Adhesion

Penetration

Invasion

TYPE OF IMPLANTATION:-

⦁ Interstitial Implantation

⦁ Deeper penetration of human blastocyst

Process of implantation is controled by:-

⦁ Epidermal growth factor (EGF)

⦁ Insulin like growth factor(IGF)

"TROPHOBLAST"         PROSTAGLANDINS

     Blastocyst

↓

(I)Tropoblast (Outer) →    (A)Synctiotrophoblast (Outer)

    (B)Cytotrophoblast(Inner) Or Langhan's Layer

       (II) Inner cell mass (Inner)

⦁ trophoblast give rise  to placenta and fetal membrane 

FUNCTION:-

⦁ Invasion  - by help of cytokines in deciduas.

⦁ Nutrition 

⦁ Production of harmones for the maintence of pregency.