Jeffery S Stevenson

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Although the existence of a complex population of mRNA in sperm is well documented, its role has not been completely elucidated. The objective of this study was to determine the relationship of mRNA abundance of sperm specific proteins and sire conception rates (SCR; a fertility index) in Holstein bulls. Samples of sperm from a single collection from(More)
Expression of estrus after PG and before fixed-time AI has been reported to change the uterine environment, increase accessory sperm numbers, fertilization rates, and overall embryo survival. Thus, expression of estrus can strongly impact overall pregnancy success. Because of variation in percentage of beef females detected in estrus and number of animals(More)
To examine the outcomes of adding medroxyprogesterone acetate (MAP) to the ovsynch protocol with the traditional ovsynch protocol in both cycling and anoestrus cows, and to evaluate a resynchronisation protocol, 742 cows averaging more than 40 days postpartum were assigned to the following four treatments: (1) ovsynch (OVS): day 0: GnRH; day 7: PGF2alpha;(More)
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