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Preattachment Embryos of Domestic Animals: Insights into Development and Paracrine Secretions

Preattachment Embryos of Domestic Animals: Insights into Development and Paracrine Secretions In mammalian species, endometrial receptivity is driven by maternal factors independently of embryo signals. When pregnancy initiates, paracrine secretions of the preattachment embryo are essential both for maternal recognition and endometrium preparation for implantation and for coordinating development of embryonic and extraembryonic tissues of the conceptus. This review mainly focuses on domestic large animal species. We first illustrate the major steps of preattachment embryo development, including elongation in bovine, ovine, porcine, and equine species. We next highlight conceptus secretions that are involved in the communication between extraembryonic and embryonic tissues, as well as between the conceptus and the endometrium. Finally, we introduce experimental data demonstrating the intimate connection between conceptus secretions and endometrial activity and how adverse events perturbing this interplay may affect the progression of implantation that will subsequently impact pregnancy outcome, postnatal health, and expression of production traits in livestock offspring. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annual Review of Animal Biosciences Annual Reviews

Preattachment Embryos of Domestic Animals: Insights into Development and Paracrine Secretions

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Publisher
Annual Reviews
Copyright
Copyright © 2017 by Annual Reviews. All rights reserved
ISSN
2165-8102
eISSN
2165-8110
DOI
10.1146/annurev-animal-022516-022900
pmid
27959670
Publisher site
See Article on Publisher Site

Abstract

In mammalian species, endometrial receptivity is driven by maternal factors independently of embryo signals. When pregnancy initiates, paracrine secretions of the preattachment embryo are essential both for maternal recognition and endometrium preparation for implantation and for coordinating development of embryonic and extraembryonic tissues of the conceptus. This review mainly focuses on domestic large animal species. We first illustrate the major steps of preattachment embryo development, including elongation in bovine, ovine, porcine, and equine species. We next highlight conceptus secretions that are involved in the communication between extraembryonic and embryonic tissues, as well as between the conceptus and the endometrium. Finally, we introduce experimental data demonstrating the intimate connection between conceptus secretions and endometrial activity and how adverse events perturbing this interplay may affect the progression of implantation that will subsequently impact pregnancy outcome, postnatal health, and expression of production traits in livestock offspring.

Journal

Annual Review of Animal BiosciencesAnnual Reviews

Published: Feb 8, 2017

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