As the blastocyst burrows, the trophectoderm begins to differentiate into subtypes of trophoblast cells, starting with cytotrophoblasts, which are progenitor stem cells in the placenta that give rise ...

IN 1949 I published a hypothesis suggesting that the cyto- and syncytio-trophoblast were derived from the granulosa cells that surround the egg when it leaves the ovary; the argument, however ...

These pluripotent cells are the most ubiquitous of all. Once removed from the blastocyst they lack the outer trophoblast structures for continued embryonic development, but they can theoretically ...

Approximately five days post fertilization (dpf), the blastocyst develops. The inner cell mass gives rise to the fetus, while the surrounding trophectoderm transforms into the placenta. After ...

The outer membrane (chorion) and trophoblast layer of the placenta are derived from the trophoectoderm of the blastocyst cells. Other extra-embryonic tissues, including the amnion (inner membrane ...