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"Cytotrophoblast" is the name given to both the inner layer of the trophoblast ... Proper cytotrophoblast function is essential in the implantation of a blastocyst ...
The cytotrophoblast is a layer of mono-nucleated cells that resides underneath the syncytiotrophoblast. [6] The syncytiotrophoblast is composed of fused cytotrophoblasts which then form a layer that covers the placental surface. [ 6 ]
Extravillous trophoblast (EVT) cells migrate from anchoring villi, and invade into the decidua basalis. Their main function is remodelling the uterine spiral arteries, to achieve an increase in the spiral artery diameter of from four to six times.
After implantation, cytotrophoblast is the inner layer of the trophoblast, composed of stem cells which give rise to cells comprising the chorionic villi, placenta, and syncytiotrophoblast. After implantation, syncytiotrophoblast is the outermost layer of the trophoblast.
Image showing trophoblast differentiated into the two layers of cytotrophoblast and syncytiotrophoblast during implantation. It is the outer layer of the trophoblasts and actively invades the uterine wall, during implantation, rupturing maternal capillaries and thus establishing an interface between maternal blood and embryonic extracellular fluid, facilitating passive exchange of material ...
A cytotrophoblast cap penetrates through the fetus' syncytiotrophoblasts and reaches the maternal decidua, forming the anchoring villus. [1] [3] [4] The cytotrophoblast layer spreads and contacts the cytotrophoblast layers of neighboring anchoring villi, creating a continuous layer called the cytotrophoblastic shell.
Uterine milk is part of the embryotroph. It is a white secretion containing proteins and amino acids that nourishes the embryo during development. The uterine milk is the actual nutritional liquid that feeds the embryo, while the embryotroph is the uterine milk plus the syncytiotrophoblast.
Intermediate trophoblast is a distinct subtype of trophoblastic tissue that arises from the cytotrophoblast. [1] It is sub-categorized by location: [1] Villous intermediate trophoblast: at anchoring villi of trophoblastic column; Implantation site intermediate trophoblast: