Autoradiographic observations on variation of DNA synthesis in the developing extraembryonic membranes of the golden hamster
1983
Lee, C.S. (Kyungbuk National Univ., Daegu (Korea R.). Coll. of Agriculture, Dept. of Veterinary Medicine)
This study was conducted to determine variations in the synthesis of DNA in the nuclei of various elements of the golden hamster (Mesocricetus auratus) placenta with increasing gestational age from the 8th day post coitum to parturition. The mitotic activities of the endodermal cells of the visceral yolk sac and of the parietal yolk sac, the trophoblastic cells of the labyrinth and the trophospongium and the giant cells were decreased with increasing gestational age. The placentation was nearly completed by 13 day of pregnancy and the increase in size of labyrinth was by appositional growth from the trophospongial cells
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