Journal ArticleDOI
Dietary excesses of urea influence the viability and metabolism of preimplantation sheep embryos and may affect fetal growth among survivors
TLDR
Excess rumen degradable N in ewe diets elevates urea and ammonia in plasma and in utero, with an associated increase in embryo mortality, Nevertheless, metabolism appears to be up-regulated in some embryos and, among those that survive, fetal growth seems to be enhanced.About:
This article is published in Animal Reproduction Science.The article was published on 1997-05-01. It has received 237 citations till now. The article focuses on the topics: Urea.read more
Citations
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Journal ArticleDOI
Maternal undernutrition during the preimplantation period of rat development causes blastocyst abnormalities and programming of postnatal hypertension.
TL;DR: The data indicate that long-term programming of postnatal growth and physiology can be induced irreversibly during the preimplantation period of development by maternal protein undernutrition, and proposes that the mildly hyperglycaemic and amino acid-depleted maternal environment generated by undernutrition may act as an early mechanism of programming and initiate conditions of 'metabolic stress', restricting early embryonic proliferation and the generation of appropriately sized stem-cell lineages.
Journal ArticleDOI
Fertility in the high-producing dairy cow ☆
TL;DR: To maintain or recover high fertility in modern dairy cows calls for a two-pronged approach involving both inclusion of fertility in broader breeding goals and adjustment to management practices.
Book
Ruminant Physiology: Digestion, Metabolism, Growth and Reproduction
TL;DR: Regulation of feed intake rumen microbiology and fermentation nutrient absorption and splanchnic metabolism endogenous regulatory and pregnancy lactation tissue growth host resistance against parasites and pathogens is studied.
Journal ArticleDOI
Stress, genes and the mechanism of programming the brain for later life.
TL;DR: It is demonstrated that early experiences trigger immediate changes in the stress system that may permanently alter brain and behaviour.
Journal ArticleDOI
The Embryo and Its Future
Tom P. Fleming,Wing Yee Kwong,Richard Porter,Elizabeth Ursell,Irina Fesenko,Adrian Wilkins,Daniel J. Miller,Adam J. Watkins,Judith J. Eckert +8 more
TL;DR: It is concluded that a complex of different mechanisms may operate to associate early embryo environment with future health.
References
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Journal ArticleDOI
Procedures for Detecting Outlying Observations in Samples
TL;DR: In this paper, a procedure for determining statistically whether the highest observation, lowest observation, highest and lowest observations, or more of the observations in the sample are statistical outliers is given.
Journal ArticleDOI
Successful culture in vitro of sheep and cattle ova
TL;DR: This communication describes the successful culture of one-cell to eight-cell sheep ova and one- cell and eight- cell cattle ova to the morula and blastocyst stages and reports a high embryo survival after transfer of cultured Ova to recipient animals.
Journal ArticleDOI
Bovine embryo morphology and evaluation
TL;DR: Results suggest that transfer of bovine embryos based on synchrony between day of recipient cycle and state of embryonic development provides higher pregnancy rates than transfers based on recipient-donor cycle synchrony.
Journal ArticleDOI
Enhanced rates of cleavage and development for sheep zygotes cultured to the blastocyst stage in vitro in the absence of serum and somatic cells: amino acids, vitamins, and culturing embryos in groups stimulate development.
TL;DR: Investigation of sheep zygote development of amino acids, ammonium, vitamins, and culture of embryos in groups in Synthetic Oviduct Fluid medium supplemented with BSA found indirect evidence that ruminant embryos utilize amino acids to a greater extent than do rodent embryos.
Related Papers (5)
Reduction of fertility and alteration of uterine pH in heifers fed excess ruminally degradable protein.
C.C. Elrod,W.R. Butler +1 more
Plasma and milk urea nitrogen in relation to pregnancy rate in lactating dairy cattle.
W.R. Butler,J J Calaman,S W Beam +2 more