No implantation in an extra-uterine pregnancy of a placentotrophic reptile

Oliver W Griffith, James U Van Dyke, Michael B Thompson

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Placentation is a common feature of live-bearing reptiles and mammals. Placentae are variable between species and can be classified by the extent that embryonic tissue breaches (invades) the uterus. Non-invasive placentation in eutherians is maternally imposed as extra-uterine embryos of species with epitheliochorial placentation will readily invade non-uterine tissues. This study documents the first observation of an extra-uterine pregnancy in a reptile; Pseudemoia entrecasteauxii, which in-utero exhibits non-invasive epitheliochorial placentation. The extra-uterine embryo did not invade maternal tissue suggesting fundamental differences between the nature and evolution of placentation in P. entrecasteauxii and eutherian mammals.
Original languageEnglish
Pages (from-to)510-511
Number of pages2
JournalPlacenta
Volume34
Issue number6
DOIs
Publication statusPublished - Jun 2013

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