placentation /pla·cen·ta·tion/ (pla″sen-ta´shun) the series of events following implantation of the embryo and leading to development of the placenta.
placentation
plac·en·ta·tion (pl s  n-t  shn)n. 1. Formation of a placenta in the uterus. 2. The type or structure of a placenta. |
placentation
1. the series of events following implantation of the embryo and leading to development of the placenta.
2. the nature of the implantation. See also placenta.
adventitial placentation
developmental of additional areas outside the normal areas, e.g. intercotyledonary in cattle.
cotyledonary placentation
the areas of placentation are limited to caruncles, approximately circular masses scattered over the placenta. Characteristic of the cow, ewe and goat doe.
diffuse placentation
the whole of the surface of the chorion is placental.
intercotyledonary placentation
abnormal placental attachments between the cotyledons, in cows.
zonal placentation
only some zones of the placenta have a vascular area involved in placentation. Characteristic of the bitch and the queen.
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Zonary placenta of carnivores. By permission from Sack W, Wensing CJG, Dyce KM, Textbook of Veterinary Anatomy, Saunders, 2002
placentation
Obstetrics The formation of the placenta in the uterus; the process by which a placenta grows and develops in the uterus. See Extrachorial placentation.
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