A review of inter- and intraspecific variation in the eutherian placenta

Abstract excerpt

The placenta is one of the most morphologically variable mammalian organs. Four major characteristics are typically discussed when comparing the placentas of different eutherian species: placental shape, maternal-fetal interdigitation, intimacy of the maternal-fetal interface and the pattern of maternal-fetal blood flow. Here, we describe the evolution of three of these features as well as other key aspects of...

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