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Influence of clinical mastitis during early lactation on reproductive performance of Jersey cows.
The purpose of this study was to determine the influence of clinical mastitis on reproductive performance of high producing Jersey cows. Cows (n = 102) with clinical mastitis during the first 150 dExpand
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Influence of subclinical mastitis during early lactation on reproductive parameters.
Our objective was to determine the effects of mastitis during early lactation on the reproductive performance of Jersey cows. From 1986 to 1997, quarter foremilk samples were collected every 4 to 8Expand
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Determination of early pregnancy in ewes utilizing transrectal ultrasonography.
Transrectal ultrasonography was used in ewes to determine the earliest day at which pregnancy could be detected, the number of embryos present, and the pattern of growth of the embryos. Twenty-oneExpand
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Retinol improves development of bovine oocytes compromised by heat stress during maturation.
The objectives of this study were to evaluate: 1) effects of a physiologically relevant elevated temperature on in vitro development of maturing oocytes, 2) effects of retinol on in vitro developmentExpand
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Ovarian structures during the estrous cycle and early pregnancy in ewes.
The development of ovarian follicular and luteal structures during the estrous cycle and early pregnancy in ewes was examined. Ewes were treated with prostaglandin F2 alpha to induce estrus; theyExpand
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Fertility aspects in yearling beef bulls grazing endophyte-infected tall fescue pastures.
During a 2-year study, yearling beef bulls were used to determine the effects of grazing on endophyte-infected tall fescue on endocrine profiles, semen quality and fertilisation potential. Bulls wereExpand
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Effect of persistent follicles on early embryonic losses in beef cows.
Low doses of progestogens in regimens for synchronization of estrus result in persistent follicles (PF) and reduced conception rates in cattle. The effects of PF on recovery of oocytes/embryos,Expand
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Synchronization of estrus in suckled beef cows for detected estrus and artificial insemination and timed artificial insemination using gonadotropin-releasing hormone, prostaglandin F2alpha, and
We determined whether a fixed-time AI (TAI) protocol could yield pregnancy rates similar to a protocol requiring detection of estrus, or estrous detection plus TAI, and whether adding a controlledExpand
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Cloning Adult Farm Animals: A Review of the Possibilities and Problems Associated with Somatic Cell Nuclear Transfer
In 1997, Wilmut et al. announced the birth of Dolly, the first ever clone of an adult animal. To date, adult sheep, goats, cattle, mice, pigs, cats and rabbits have been cloned using somatic cellExpand
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Reproductive hormonal responses to ergotamine and ergonovine in cows during the luteal phase of the estrous cycle.
We conducted research to evaluate whether ergot alkaloids associated with endophyte-infected tall fescue could alter plasma concentrations of hormones important to reproductive function in cows. SixExpand
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