(from the article `pregnancy`) ...becomes thinner. After 12 weeks or so, the villi on this side, which is the side directed toward the uterine cavity, disappear, leaving the smooth ...
The part of the chorion where the villi persist, forming the foetal part of the placenta. ... Synonym: shaggy chorion. ... (05 Mar 2000) ... 
Type: Term Synonyms: villous chorion