Semen Placement Effects on Fertility in Bovines
TLDR
Bovine spermatozoa from one ejaculate from nine bulls, extended in milk and 10% glycerol, were frozen in glass ampules and a split sample technique was used to compare fertility levels resulting from semen deposition 4, 8, and 12 cm anterior to the external uterine orifice.About:
This article is published in Journal of Dairy Science.The article was published on 1968-05-01 and is currently open access. It has received 39 citations till now. The article focuses on the topics: Insemination & Semen.read more
Citations
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Sustaining the Fertility of Artificially Inseminated Dairy Cattle: The Role of the Artificial Insemination Industry
TL;DR: Cryopreservation techniques that extend the duration of post-thaw sperm survival and/or reduce rates of capacitation may reduce sensitivity to insemination timing and are promising opportunities to improve fertility from the male perspective.
Journal ArticleDOI
Optimising reproductive performance of beef cows and replacement heifers.
Michael G. Diskin,David A. Kenny +1 more
TL;DR: Increased efforts are being made internationally to genetically identify and select for more reproductively efficient beef cows, but this is a more long-term strategy and will not replace the need for a high level of technical efficiency and management practice at farm level.
Journal ArticleDOI
Site of semen deposition in cattle: a review
TL;DR: This review updates the literature on the ideal site of semen deposition, including cervical, uterine body, cornual and intraperitoneal, and the question of whether the clinical training of inseminators should be reevaluated is discussed.
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Nonreturn rates of dairy cattle following uterine body or cornual insemination.
TL;DR: Cornual and uterine body deposition of semen yielded similar results; therefore, depositing an inseminate in the uterine horns to maximize fertility is unnecessary.
Journal ArticleDOI
Managing the reproductive performance of beef cows.
Michael G. Diskin,David A. Kenny +1 more
TL;DR: A reproductively efficient beef cow herd will be fundamental to meeting the protein and specifically, red meat demand of an ever increasing global population, but attaining a high level of reproductive efficiency is underpinned by producers being cognizant of and achieving many key targets throughout the production cycle and requires considerable technical competency.
References
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Principles and Procedures of Statistics.
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The Effect of Cervical, Uterine and Cornual Insemination on Fertility of the Dairy Cow
G.W. Salisbury,N.L. Vandemark +1 more
TL;DR: The results of three different experiments showed that, on a non-return to heat basis of assaying conception, equally satisfactory fertility was obtained from deposition of the diluted semen into the cervix, the body of the uterus or the uterine horns when the inseminating tube was guided into the reproductive tract by the rectal technique.
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Interrelationships between Site of Deposition, Dosage, and Number of Spermatozoa in Diluted Semen and Fertility of Dairy Cows Inseminated Artificially
TL;DR: There was a tendency for the higher concentrations, larger dosages, and deeper depositions to produce the highest fertility, with an average increase of 1.2% in nonreturns for each 10 million additional sperm deposited.
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The Relation of Site of Semen Deposit to Breeding Efficiency of Dairy Cattle
TL;DR: The treatment mean for semen deposited in the body of the uterus was slightly higher than when semen was depositing in the cervix, in each horn of the womb or a combination of the body and cervix; however, no significance is attached to these differences.