Morphogenesis of the Fetal Membranes and Placenta of the Tree Shrews, Family Tupaiidae

Allantoic vesicle Amniogenesis Anat Animal antimesometrial appears arterioles attachment Authorities basal base basement membrane believed Bilaminar omphalopleure bilateral blastocyst Carnivora characteristic chorio-allantoic placenta Chorio-vitelline placenta chorionic plate coiled COLLECTION completely consists contains continued cytoplasm cytotrophoblast decidual knots Depth described developed discoid early embryonic endoderm endometrial pads endotheliochorial endothelium epitheliochorial evidence examined Family fetal membranes Figure Finer morphology folding formation giant cells groups hemochorial Hill Hubrecht implantation Insectivora labyrinth labyrinthine late later stages layer Location mammals masses maternal measures mesenchymal mesometrial minor Mossman multinucleated Note nuclei numerous occur Order Orientation Orientation disc Orientation first attachment permanent persists placental disc pregnancy present primary villi Primates prominent region relationships seen separates Shape similar species specimen stage stroma suggests superficial surface surrounded syntrophoblast Talpinae term thickness tree shrews trophoblast Tupaia javanica tupaiids Type uterine epithelium uterine glands uterine horn uterine lumen Vascular splanchnopleure wall yolk sac zone