• Publications
  • Influence
Control of follicular growth: local interactions and nutritional influences.
Regulation of ovarian activity is an integrated process encompassing both extraovarian signals and intrafollicular factors. Initiation of primordial follicle growth and the early stages ofExpand
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Effect of dietary-induced increases in circulating insulin concentrations during the early postpartum period on reproductive function in dairy cows.
Although it has become increasingly clear that fertility in modern dairy cattle is declining in association with increased milk yields, the underlying mechanism is poorly understood. The firstExpand
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On-farm methane measurements during milking correlate with total methane production by individual dairy cows.
The objective of this study was to investigate whether measurement of methane emissions by individual dairy cows during milking could provide a useful technique for monitoring on-farm methaneExpand
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Seasonal variation in milk conjugated linoleic acid and Δ9-desaturase activity in dairy cows
The objective of this work was to study changes in the fatty acid profile of cows’ milk throughout the year with particular emphasis on cis-9, trans-11 conjugated linoleic acid (CLA), a provenExpand
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Integration of physiological mechanisms that influence fertility in dairy cows.
Fertility in dairy cows has been declining for the past three decades. Genetic selection for increased milk production has been associated with changes in key metabolic hormones (growth hormone,Expand
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Variation among individual dairy cows in methane measurements made on farm during milking.
The objective of this study was to quantify on-farm variation between and within cows in methane emissions measured during milking, and to determine which factors are related to this variation.Expand
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Variation of milk citrate with stage of lactation and de novo fatty acid synthesis in dairy cows.
Citrate is a normal constituent of milk that affects milk-processing characteristics. It is an intermediate in the tricarboxylic acid cycle and plays an indirect role in fat synthesis by providingExpand
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Nutrition, metabolism, and fertility in dairy cows: 1. Dietary energy source and ovarian function.
In previous studies, high plasma insulin was associated with earlier resumption of postpartum estrous cycles in dairy cows. The objective of this experiment was to quantify hormonal and ovarianExpand
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