Pinopodes, as one of a unique structure present in the endometrial surface only appears during Windows of Implantation (WOI), how this could happen? Where is the pinopodes after WOI? Thank you.
Pinopods have features that enable the embryo to attach and feed during the implantation window period. It is a marker for the realization of implantation, but also an indispensable structure. In implantation, the pinopod structure, as the apical surface of the endometrium, plays an important role in the adhesion of the 6-7 days old blastocyst to this region. Its paracrine and morphological structure attracts the embryo. And besides it looks very good under the electron microscope, it can even be selected under the light microscope.