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Uterine biology in pigs and sheep.
MedLine Citation:
PMID:  22958877     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
There is a dialogue between the developing conceptus (embryo-fetus and associated placental membranes) and maternal uterus which must be established during the peri-implantation period for pregnancy recognition signaling, implantation, regulation of gene expression by uterine epithelial and stromal cells, placentation and exchange of nutrients and gases. The uterus provide a microenvironment in which molecules secreted by uterine epithelia or transported into the uterine lumen represent histotroph required for growth and development of the conceptus and receptivity of the uterus to implantation. Pregnancy recognition signaling mechanisms sustain the functional lifespan of the corpora lutea (CL) which produce progesterone, the hormone of pregnancy essential for uterine functions that support implantation and placentation required for a successful outcome of pregnancy. It is within the peri-implantation period that most embryonic deaths occur due to deficiencies attributed to uterine functions or failure of the conceptus to develop appropriately, signal pregnancy recognition and/or undergo implantation and placentation. With proper placentation, the fetal fluids and fetal membranes each have unique functions to ensure hematotrophic and histotrophic nutrition in support of growth and development of the fetus. The endocrine status of the pregnant female and her nutritional status are critical for successful establishment and maintenance of pregnancy. This review addresses the complexity of key mechanisms that are characteristic of successful reproduction in sheep and pigs and gaps in knowledge that must be the subject of research in order to enhance fertility and reproductive health of livestock species.
Authors:
Fuller W Bazer; Gwonhwa Song; Jinyoung Kim; Kathrin A Dunlap; Michael Carey Satterfield; Gregory A Johnson; Robert C Burghardt; Guoyao Wu
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Publication Detail:
Type:  Journal Article     Date:  2012-07-16
Journal Detail:
Title:  Journal of animal science and biotechnology     Volume:  3     ISSN:  2049-1891     ISO Abbreviation:  J Anim Sci Biotechnol     Publication Date:  2012  
Date Detail:
Created Date:  2012-09-10     Completed Date:  2012-10-02     Revised Date:  2013-04-02    
Medline Journal Info:
Nlm Unique ID:  101581293     Medline TA:  J Anim Sci Biotechnol     Country:  England    
Other Details:
Languages:  eng     Pagination:  23     Citation Subset:  -    
Affiliation:
Department of Animal Science, 442D Kleberg Center, 2471 TAMU, Texas A&M University, College Station, TX, 77843-2471, USA. fbazer@cvm.tamu.edu.
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