nondeciduate placenta

biology

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July 1, 2026

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A nondeciduate placenta is a type of placenta where the fetal and maternal tissues are only superficially connected. This means that at birth, no maternal tissue is lost. This is characteristic of animals like ungulates and whales. Mammals with this type of placenta are classified as Nondeciduata. In contrast, other mammals, like primates, have placentas where fetal and maternal tissues are more intimately connected, and the maternal tissue is shed during birth. This difference in placental structure can affect the exchange of substances between mother and fetus.123

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mammal
Implantation, gestation, and birth
…resorbed by the female (nondeciduate). Placentas have been classified on the basis of the relationship between maternal and embryonic tissues. In the simplest nondeciduate placental arrangement, the chorionic villi are in contact with uterine epithelium (the inner surface layer). In the “intimate deciduous” types, seen in primates, bats, insectivores,…
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…resorbed by the female (nondeciduate). Placentas have been classified on the basis of the relationship between maternal and embryonic tissues. In the simplest nondeciduate placental arrangement, the chorionic villi are in contact with uterine epithelium (the inner surface layer). In the “intimate deciduous” types, seen in primates, bats, insectivores,…
Read More