Synonym: multiple pregnancy. ... Origin: poly-+ G. Kyesis, pregnancy ... (05 Mar 2000) ... 
(pol″e-si-e´sis) multiple pregnancy.
Type: Term Pronunciation: pol′ē-sī-ē′sis Synonyms: multiple pregnancy
polycyesis Multiple pregnancies or bearing two or more fetuses simultaneously. Pregnancy in which two or more fetuses exist simultaneously. It may be monovular (resulting from the fertilization of a single ovum) or polyovular (resulting from the fertilization of more than one ovum). When more than two fetuses coexist, they may come from one ovum ...