Work

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

Year: 2015

Type: review

Abstract: 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 eutherian placentation. In addition to interspecific anatomical variation, there is also variation in placental anatomy and function within a single species. Much of this intraspecific variation occurs in response to different environmental conditions such as altitude and poor maternal nutrition. Examinations of variation in the placenta from both intra- and interspecies perspectives elucidate different aspects of placental function and dysfunction at the maternal-fetal interface. Comparisons within species identify candidate mechanisms that are activated in response to environmental stressors ultimately contributing to the aetiology of obstetric syndromes such as pre-eclampsia. Comparisons above the species level identify the evolutionary lineages on which the potential for the development of obstetric syndromes emerged.

Source: Philosophical Transactions of the Royal Society B Biological Sciences

DOI: 10.1098/rstb.2014.0072

Authors: William E. Gundling, Derek E. Wildman

Institutions: University of Illinois Urbana-Champaign, Wayne State University, University of Illinois System, Carl R. Woese Institute for Genomic Biology

Language: English

Topic: Pregnancy and preeclampsia studies

Subfield: Obstetrics and Gynecology

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funder: Eunice Kennedy Shriver National Institute of Child Health and Human Development