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= Preimplantation factor =

Preimplantation factor or simply PIF is...

Discovery
Preimplantation factor was discovered by bioassay in 19...

Structure
Preimplantation factor is a short polypeptide ...

Function
There are many functions of preimplantation factor...

Immunomodulation
Preimplantation factor is involved in immunomodulation at the feto-maternal interface.

Viability of Pregnancy
Preimplantation factor is found in trophoblast cells and is involved in placentation and pregnanc viability.

Apoptosis
Preimplantation is a downstream regulator of the p53 apoptosis pathway...