Susanne Meier

..The physiological implication of these local effects of the pre-implantation conceptus, on reproductive success requires further investigation...

..However, alternative indirect measures of energy balance (e.g., milk fat:protein ratio) may be a useful tool when examining the relationships between energy balance in dairy cows and birth sex ratio...

..Synchronisation method altered trophoblast PGE(2) release, highlighting the importance of the hormonal environment in modifying embryonic prostaglandin synthesis and release...

..A simple model able to estimate parameters describing progesterone appearance and disappearance can be used to explore the relationships between profile shapes and reproductive outcomes...

..The differences in the luteal phase of these subpopulations, in particular progesterone early in the luteal phase and the early onset of functional luteal regression, may provide an insight into factors associated with subfertility...

..The observed changes in endometrial FA between Holstein-Friesian cows of different genetic origins or reproductive states may reflect differences in endometrial function and may affect reproductive function...

..This study provides strong evidence that the endometrial gene expression profile may contribute to the inferior reproductive performance of the subfertile dairy cow strain...

..Results of this study indicate that MPG supplementation reduced the interval from calving to first ovulation in heifers having poor body condition at calving...

..To gain a more complete picture of these molecular events, genome-wide transcriptional profiles of reproductive day 17 endometrial tissue were determined in pregnant and cyclic Holstein-Friesian dairy cattle...

..Fifteen candidate endogenous control genes were assessed across different tissue subtypes in pregnant and cycling Holstein-Friesian dairy cows from two divergent genetic backgrounds...

..These data indicate different levels of diurnal variation, with glucose, insulin, NEFA and BHBA having the largest daily variation. These diurnal patterns need to be considered in future investigations of these metabolites and hormones...

..Results do not support a periparturient metabolic benefit to altering the SC to NFC ratio precalving, but imply an altered rumen fermentation, gluconeogenesis, and milk composition when dietary SC to NFC ratio is altered postcalving...

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..Similar profiles of nonesterified fatty acids and glucose indicated that energy status was not a risk factor for endometritis...

..These results quantify the immediate and subsequent responses in reproductive performance and milk production to a severe restriction in DMI at the onset of a seasonal breeding period in pasture-grazed dairy cows...

..This review highlights many fruitful directions for research, aimed at the development of strategies for nutritional management of reproduction in the high-producing subfertile dairy cow...

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