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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
biochemistry, genetics and molecular biology
Early implantation and embryonic development of the baboon: stages 5, 6 and 7
Anatomy and Embryology, Volume 176, No. 3, Year 1987
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Description
Implantation stages of the olive baboon, Papio cynocephalus anubis, showing embryonic development equivalent to Carnegie stages 5, 6 and 7 of development, were collected by hysterotomy and examined histologically. The younger specimens (stage 5) consisted of a thick trophoblastic plate composed of cytotrophoblast and syncytiotrophoblast with multiple small clefts, and a bilaminar disk embryo with a small slit-like amniotic cavity. An epithelial plaque response was present in the uterine epithelium immediately peripheral to the implantation site, within an area of pronounced uterine edema. The bilaminar embryonic disk consisted of columnar epiblast cells underlying the amniotic cavity, and thickened visceral endodermal cells that form part of the yolk sac. The slightly further developed placenta (stage 6) consisted predominantly of cytotrophoblast including primary villi and syncytotrophoblast lining large spaces containing maternal blood. Secondary placental villi were present in the oldest group (stage 7), and there was modest decidualization of the uterine stroma. An epithelial plaque response persisted, but varied in extent. The sequence of events in early development in the baboon is similar to that in the rhesus monkey insofar as blood space formation and endometrial responses are concerned. However, the plaque response is not so great as in the rhesus; there is no secondary placenta, and the decidual response is slightly more extensive. © 1987 Springer-Verlag.
Authors & Co-Authors
Tarara, Ross P.
Kenya, Nairobi
National Museums of Kenya
Enders, A. C.
United States, Davis
California National Primate Research Center
Hendrickx, Andrew G.
United States, Davis
California National Primate Research Center
Gulamhusein, Nabilah
Kenya, Nairobi
National Museums of Kenya
Hodges, John Keith
United Kingdom, London
Zoological Society of London Institute of Zoology
Hearn, John P.
United Kingdom, London
Zoological Society of London Institute of Zoology
Eley, R. M.
Kenya, Nairobi
National Museums of Kenya
Else, James G.
Kenya, Nairobi
National Museums of Kenya
Statistics
Citations: 29
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.1007/BF00310182
ISSN:
03402061
e-ISSN:
14320568
Research Areas
Maternal And Child Health