Q.111)  Chorion/Chorionic Membrane formed from Q.112)  Bilaminar disc of Pre-embryo attached to trophoblast by? ( 2 words ) Q.113)  are villi that sprout from the chorion in order to give a maximum area of contact with the maternal blood. ( 2 words ) Q.114)  Primary Chorionic Villi? ( 3 words )