Villous atrophy occurs when your intestinal villi—the microscopic, finger-like tentacles that line the wall of your small intestine—erode away, leaving a virtually flat surface. Celiac disease, an ...

The chorionic sac encompasses the fetus and the amnion and is covered with chorionic villi until the 8th week. After the 8th week, these villi are constricted due to a decreased blood supply until ...

What Is the hCG Diet? Human chorionic gonadotropin (hCG) is a hormone your body normally makes. However, during pregnancy, the placenta makes hCG in large amounts. So, hCG is what pregnancy tests ...

The human placenta is composed of chorionic villi which are lined by a trophoblast bilayer containing an inner cytotrophoblast (CTB) and outer syncytiotrophoblast (STB) layer. Extravillous ...