scholarly journals Reproductive Performance of Holstein Dairy Cows Grazing in Dry-summer Subtropical Climatic Conditions: Effect of Heat Stress and Heat Shock on Meiotic Competence and In vitro Fertilization

2015 ◽  
Vol 28 (3) ◽  
pp. 334-342 ◽  
Author(s):  
Krishna Pavani ◽  
Isabel Carvalhais ◽  
Marwa Faheem ◽  
Antonio Chaveiro ◽  
Francisco Vieira Reis ◽  
...  
Keyword(s):  
Heat Stress ◽  
Heat Shock ◽  
In Vitro Fertilization ◽  
Dairy Cows ◽  
Reproductive Performance ◽  
Climatic Conditions ◽  
Vitro Fertilization ◽  
Meiotic Competence ◽  
Holstein Dairy Cows

Effect of Heat Shock and Cysteamine During In Vitro Fertilization on Preimplantation Development of Bovine Embryo.

2010 ◽  
Vol 83 (Suppl_1) ◽  
pp. 258-258
Author(s):  
Miki Sakatani ◽  
Ahmed Zaky Balboula ◽  
Ken-ichi Yamanaka ◽  
Masashi Takahashi
Keyword(s):  
Heat Shock ◽  
In Vitro Fertilization ◽  
Preimplantation Development ◽  
Bovine Embryo ◽  
Vitro Fertilization

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

1990 ◽  
Vol 1990 ◽  
pp. 3-3
Author(s):  
C. S. Mayne ◽  
W. J. McCaughey
Keyword(s):  
In Vitro Fertilization ◽  
Dairy Cows ◽  
Embryo Transfer ◽  
Embryo Implantation ◽  
Dairy Herd ◽  
Animal Production ◽  
Animal Performance ◽  
Vitro Fertilization ◽  
Recent Developments

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.

scholarly journals Influence of previous exposure to Chlamydia trachomatis on in vitro fertilization and embryo transfer programs outcome

2012 ◽  
Vol 61 (5) ◽  
pp. 68-79
Author(s):  
Valeriya Sergeyevna Samulyzhko
Keyword(s):  
Heat Shock ◽  
In Vitro Fertilization ◽  
Chlamydia Trachomatis ◽  
Heat Shock Protein ◽  
Previous Exposure ◽  
Vitro Fertilization ◽  
Transfer Programs ◽  
Major Mechanism

This review presents the existing literature on association between the presence of Chlamydia trachomatis antibodies in various biological materials and the success of IVF and ET treatment. This article discusses major mechanism of infertility within patients with previous exposure to C. trachomatis and the role of chlamydial heat shock protein in its pathogenesis

Heat shock during in vitro maturation of bovine oocytes disturbs bta‐miR‐19b and DROSHA transcripts abundance after in vitro fertilization

2021 ◽  
Author(s):  
Vanessa das Graças Pereira de Souza ◽  
Gustavo Torres de Souza ◽  
Diana Rangel de Lemos ◽  
Judith Maria de Oliveira Guimarães ◽  
Carolina Capobiango Romano Quintão ◽  
...  
Keyword(s):  
Heat Shock ◽  
In Vitro Fertilization ◽  
In Vitro Maturation ◽  
Vitro Fertilization ◽  
Bovine Oocytes

scholarly journals Reproductive Biotechnologies in Indian Cattle

2018 ◽  
Vol 3 (1) ◽  
pp. 1-4
Author(s):  
Purohit GN
Keyword(s):  
In Vitro Fertilization ◽  
Dairy Cows ◽  
Embryo Transfer ◽  
Artificial Insemination ◽  
Human Beings ◽  
Vitro Fertilization ◽  
The Status ◽  
Indian Cattle

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.

139 PERTURBATION OF THE DYNAMICS OF DNA METHYLATION IN THE PATERNAL GENOME FOLLOWING IN VITRO FERTILIZATION IN CATTLE: THE SECRETS OF HEAT STRESS EFFECTS

2014 ◽  
Vol 26 (1) ◽  
pp. 183
Author(s):  
M. B. Rahman ◽  
T. Rijsselaere ◽  
A. Van Soom
Keyword(s):  
Dna Methylation ◽  
Heat Stress ◽  
In Vitro Fertilization ◽  
Chromatin Condensation ◽  
Histone Variants ◽  
Dna Demethylation ◽  
Paternal Genome ◽  
Vitro Fertilization ◽  
Fourier Harmonic

Ejaculates collected from breeding bulls during the summer season under tropical or subtropical conditions are often reported to have a lower fertilization potential. We recently reported that sperm cells at post-meiotic stages of development were more susceptible to heat stress (scrotal insulation technique). In post-meiotic stages of sperm cell development, extensive incorporation of histone variants and hyperacetylation confirms unstable chromatin. The unstable forms of chromatin are more vulnerable to heat stress and affect sperm DNA-protamine condensation. By using a special stain and nuclear morphometric assessment, Chromomycin A3 and Fourier harmonic analysis, respectively, we observed protamine-deficient spermatozoa with altered chromatin condensation in the heat-stressed ejaculates. In a recent study, we investigated the patterns of global DNA methylation in pronuclear development and fertilization potential of such altered chromatin condensed spermatozoa. To this end, 1239 in vitro-matured oocytes were fertilized with spermatozoa of 3 groups (i.e. standard IVF control, non-heat-stressed control, and heat-stressed spermatozoa). Data were analysed by means of ANOVA. The results showed that heat-stressed spermatozoa with altered chromatin condensation perturb the dynamics of DNA methylation reprogramming in the paternal pronucleus (i.e. disordered the active demethylation followed by a de novo methylation pattern during one cell stage). In addition, there was a tendency for a decrease in the size of both paternal and maternal pronuclei developed after fertilization with heat-stressed spermatozoa in comparison with standard IVF control spermatozoa, leading to lower fertilization rates (54 v. 82%). Future studies should focus on the mechanisms of perturbed DNA demethylation in the paternal genome after in vitro fertilization of oocytes with spermatozoa having altered chromatin condensation.

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