VGO-0169
QUESTION
Epitheliochorial placenta is seen in?
OPTIONS
(A) Cow
(B) Mare
(C) Man
(D) Rat
ANSWER
(B) Mare
EXPLANATION
The mare has a diffuse epitheliochorial placenta that retains the maternal uterine epithelium at the maternal-fetal interface. Humans and rats have hemochorial placentation, with trophoblast exposed to maternal blood. Cattle are more specifically described as synepitheliochorial, historically syndesmochorial, even though they are sometimes grouped broadly with epitheliochorial species. The mare is the unambiguous classical epitheliochorial example in this set.
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Veterinary Gynaecology and Obstetrics · 240 Questions
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