Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Cattle -- Reproduction."”.
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The role of Beta carotene in dairy cattle reproduction and its in vivo effect on corpus luteum function
To determine the effects of Beta carotene (B) on reproduction and to define better the role of metabolic hormones during early lactation, seventy-eight Holsteins were alternately assigned at calving to either supplementation with 600 mg synthetic B daily (BC) from day 30 through day 90 of lactation …
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Prediction of Fertility of Virginia Beef Heifers Using Expert Systems Technology
… from scientific literature and from a beef cattle reproduction expert. The expert system computes an evaluation age, age both at the start and end of the breeding season, and weight per day of age to classify a heifer as having either a 3LOW2, 3GOOD2, or 3EXCELLENT2 likelihood of conception. …
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HEMODYNAMICS STUDIES OF THE PREOVULATORY FOLLICLE AND CORPUS LUTEUM IN CATTLE
… efficiency in the livestock sector depends upon reproduction success at the farms. Evaluation of follicle and corpus luteum hemodynamics by color-Doppler ultrasonography is becoming more commonly used in cattle reproductive management. Improved understanding of the relationships between size and …
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EFFECTS OF A PROTECTED FAT SUPPLEMENT ON THE GNRH INDUCED LH RELEASE IN EARLY POSTPARTUM BEEF COWS AND OVARIECTOMIZED BEEF COWS
… effect of feeding a protected-fat supplement on reproduction. In the first trial eight ovariectomized brangus cows were used to study the effect of feeding a protected-fat supplement on LH release after GnRH injection. The cows were equally divided at random into two groups (control and …
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Effects of In Vitro Maturation and Fertilization of Cattle Ova on Rate of Twinning in Beef Cattle
An experiment was conducted at Southwest Texas State University, San Marcos, to examine the effects of using in vitro matured and fertilized embryos in embryo transfer to induce twinning and examine the influence of twinning on cow production and carcass characteristics between single and twin …
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Strategies to Improve Reproductive Efficiency in Cattle with Dietary Intervention
… dietary intervention. The use of diet to enhance reproduction is theoretically a low-cost and low-input method that will co-align with reproductive technologies' beneficiary effects. Ideally, with improved nutrition intervention, these technologies will become more feasible and practical to …
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Heritability and repeatability estimates of first service conception and first cycle calving in Angus cattle
… remains one of the largest economic impacts on cattle producers. Infertility and(or) sub-fertility in the cow herd can result in financial losses due to a reduction in calf crop, lower quality calves, and increased breeding and replacement costs. Improving reproductive efficiency via altered …