Medically reviewed by Robert Burakoff, MD Intestinal villi (singular: villus)are tiny, finger-like projections that line the ...

Researchers have discovered that the development of blood vessels in the mouse placenta is controlled epigenetically.

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 ...

Chorionic villus sampling (CVS) is a newer and slightly more risky alternative to amniocentesis that is performed earlier in the course of development, between 10 and 12 weeks of pregnancy.