VGO-0062
QUESTION
On the basis of maternal foetal barrier, type of placenta in bitch is?
OPTIONS
(A) Syndesmochorial
(B) Haemochorial
(C) Epitheliochorial
(D) Endotheliochorial
ANSWER
(D) Endotheliochorial
EXPLANATION
The bitch has an endotheliochorial placental interface, meaning fetal chorionic tissue is separated from maternal blood by the maternal vascular endothelium. Epitheliochorial placentation retains the maternal uterine epithelium, while hemochorial placentation exposes trophoblast directly to maternal blood. Syndesmochorial is an older term applied to ruminant placentation. None of those alternatives describes the normal canine maternal-fetal barrier.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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