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• W2053526260 abstract "The chorioallantoic placental interhemal membrane of <i>Miniopterus schreibersii fuliginosus</i> has been described electron-microscopically. Morphologically thereare three main types of placentae which develop in chronological sequence. They are (1) primary placenta, (2) secondary placenta and (3) tertiary placenta. In neural groove and limb-bud embryos the primary placenta consists of the following elements which separate the maternal and fetal circulations: (1) a continuous ectoplasmic layer, (2) intrasyncytial lamina, (3) syncytiotrophoblast, (4) cytotrophoblast, (5) basal lamina, (6) mesenchyme and (7) fetal endothelium. The primary placenta degenerates until term when it consists of a thin syncytiotrophoblastic layer resting on basal lamina. Mesenchyme does not show the presence of fetal capillaries. The secondary placenta is formed in early limb-bud embryos. The electron microscope has revealed that the placenta is of the endotheliomonochorial type and (1) consists of a well-developed maternal endothelium, (2) the trophoblast surrounding the maternal blood tubule is cellu lar, not syncytial as previously thought and the apical plasma membrane of these trophoblastic cells is in direct contact with the discontinuous interstitial membrane, (3) basal lamina, (4) mesenchyme and (5) fetal endothelium. Tertiary placenta at full term stage is of the hemodichorial type having the following elements: (1) thin ectoplasmic layer, (2) a thick intrasyncytial lamina, (3) syncytiotrophoblast, (4) cytotrophoblast, (5) basal lamina, (6) mesenchyme and (7) fetal endothelium. The definitive chorioallantoic placental barrier in this bat thus differs from the organization earlier proposed by Chari and Gopalakrishna [Proc. Indian Acad. Sci. <i>93: </i>463-483, 1984] on the basis of light-microscopic observations: (1) the absence of maternal endothelium in the primary placenta from the neural groove and early limb-bud embryos, (2) the existence of only cellular trophoblast in the secondary placenta throughout the gestation and (3) the presence of well-developed hemodichorial tertiary placenta is the unique feature of the interhemal membrane in higher Chiroptera." @default.
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• W2053526260 title "Ultrastructural Development of Chorioallantoic Placenta in the Indian Miniopterus Bat, <i>Miniopterus schreibersii fuliginosu</i><i>s</i> (Hodgson)" @default.
• W2053526260 doi "https://doi.org/10.1159/000147374" @default.
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