Results 131 to 140 of about 3,983 (179)

The Trilineage Coexistence Observed During the Differentiation of Porcine EPSCs. [PDF]

open access: yesCells
Zhao L   +12 more
europepmc   +1 more source

The role of amniotic epithelial cells in preterm birth: mechanisms and clinical implications. [PDF]

open access: yesFront Cell Dev Biol
Meng L   +10 more
europepmc   +1 more source

Monotreme development with particular reference to the extraembryonic membranes [PDF]

open access: yesThe Journal of Experimental Zoology, 1993
AbstractThis paper considers many of the salient features of monotreme development, particularly morphogenesis of the extraembryonic membranes.The uterine endometrium of both monotremes and marsupials exhibits a progesterone driven luteal phase where accelerated utilization of endometrial nutrients is evidenced by a rapid post‐primitive streak ...
R L Hughes
exaly   +8 more sources

Formation of the Placenta and Extraembryonic Membranes [PDF]

open access: yesAnnals of the New York Academy of Sciences, 1998
ABSTRACT: In eutherian mammals, the first cell types that are specified during embryogenesis are committed to form extraembryonic (placenta and fetal membranes) rather than embryonic structures. The trophoblast cell lineage, for example, forms at the morula‐to‐blastocyst transition: cells at the periphery of the morula become trophoblast, whereas ...
James C Cross
exaly   +4 more sources

Developmental morphology and evolution of extraembryonic membranes of lizards and snakes (Reptilia, Squamata) [PDF]

open access: yesJournal of Morphology, 2020
Abstract Amniote embryos are supported and nourished by a suite of tissues, the extraembryonic membranes, that provide vascular connections to the egg contents. Oviparous reptiles share a basic pattern of development inherited from a common ancestor; a vascular chorioallantoic membrane, functioning as a respiratory organ, contacts the
Stewart, James R., James R. Stewart
openaire   +4 more sources

Extraembryonic membrane development in a reproductively bimodal lizard, Lacerta (Zootoca) vivipara [PDF]

open access: yesZoology, 2004
Reproductive mode has been remarkably labile among squamate reptiles and the evolutionary transition from oviparity to viviparity commonly has been accompanied by a shift in the pattern of embryonic nutrition. Structural specializations for placental transfer of nutrients during intrauterine gestation are highly diverse and many features of the ...
Stewart, James R.   +2 more
openaire   +4 more sources

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