An evaluation of the effects of thinning in dairy cows on animal production

Author(s):  
C. S. Mayne ◽  
W. J. McCaughey

Recent developments in in vitro fertilization and embryo transfer technology (Lu, et al, 1987) have facilitated the production of twin, continental cross calves from the dairy herd through non-surgical embryo implantation. However, the successful exploitation of this technology in practice requires information on the effects of embryo transfer and/or twinning on animal performance and how these effects may be influenced by feeding and management factors. The objectives of this study were to examine the effects of different management and feed regimes pre- and post-calving on the performance of single- and twin-bearing cows.

2008 ◽  
Vol 25 (9-10) ◽  
pp. 473-476 ◽  
Author(s):  
Arthur Babayan ◽  
Andreas Neuer ◽  
Stefan Dieterle ◽  
Ann Marie Bongiovanni ◽  
Steven S. Witkin

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Hong Zeng ◽  
Yu Fu ◽  
Lang Shen ◽  
Song Quan

Abstract Background MicroRNAs (miRNAs) are small, non-coding RNAs that are dysregulated in many diseases and can act as biomarkers. Although well-studied in cancer, the role of miRNAs in embryo implantation is poorly understood. Approximately 70% of embryos fail to implant following in-vitro fertilization and embryo transfer, 10% of patients experienced recurrent implantation failure. However, there are no well-established biomarkers that can predict implantation failure. Our purpose is to investigate distinct miRNA profiles in plasma and plasma exosomes during the window of implantation between patients with failed implantation and successful implantation. Methods We select a nested case-control population of 12 patients with implantation failure or successfully clinical pregnancy using propensity score matching. RNA was extracted from plasma and plasma exosomes collected during the window of implantation (WOI). MicroRNA expression in all samples was quantified using microRNA sequencing. The intersection of differently expressed miRNAs in plasma and exosomes were further validated in the GEO dataset. Significantly altered microRNAs in both plasma and plasma exosomes were then subjected to target prediction and KEGG pathway enrichment analyses to search for key signaling pathways. WGCNA analysis was performed to identify hub miRNAs associated with implantation. Results 13 miRNAs were differentially expressed in both plasma and plasma exosomes in patients with implantation failure. Among them, miR-150-5p, miR-150-3p, miR-149-5p, and miR-146b-3p had consistent direction changes in endometrium of patients with recurrent implantation failure (RIF), miR-342-3p had consistent direction changes in blood samples of patients with RIF. Pathway enrichment analysis showed that the target genes of differentially expressed miRNAs are enriched in pathways related to embryo implantation. WGCNA analysis indicated that miR-150-5p, miR-150-3p, miR-146b-3p, and miR-342-3p are hub miRNAs. Conclusions Implantation failure is associated with distinct miRNA profiles in plasma and plasma exosomes during WOI.


2018 ◽  
Vol 3 (1) ◽  
pp. 1-4
Author(s):  
Purohit GN

In recent years there have been immense improvements in application of reproductive biotechnologies in ca ttle and include artificial insemination, embryo transfer, ovum pick up and in vitro fertilization, semen sexing, cloning, transgenics and xenotransplantation. The purpose of these technologies had been improvement of the genetics of animals or producing a nimals of benefit to human beings. The application of these technologies in indigenous dairy cows of India had been slow. This manuscript describes the status of some of the reproductive biotechnologies as applied to Indian breeds of cows.


1996 ◽  
Vol 13 (7) ◽  
pp. 536-539 ◽  
Author(s):  
Dan Tulchinsky ◽  
Amir Tulchinsky ◽  
Virginia Paoletti-Falcone ◽  
Holly Nash ◽  
Stephen Pazdziorko ◽  
...  

1992 ◽  
Vol 37 (1) ◽  
pp. 64-68
Author(s):  
H. Saito ◽  
F. Sato ◽  
T. Hirayama ◽  
T. Saito ◽  
K. Kawagoe ◽  
...  

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