Download or read book The Postpartum Reproductive Performance of the Icelandic Dairy Cow written by Jón Eldon and published by . This book was released on 1988 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Postpartum Reproductive Performance in Dairy Cows Under Different Managemental Systems and in Cows with Induced Parturitions written by Kalle Kask and published by . This book was released on 1999 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationship Between Milk Yield and Post partum Reproductive Performance in Holstein Dairy Cows written by Humphrey Hamudikuwanda and published by . This book was released on 1985 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Prostaglandin F2 alpha on Reproductive Performance in the Postpartum Dairy Cow and the Mechanism Behind Its Benefits written by Kathryn Genevieve Younger and published by . This book was released on 2016 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the beginning of the postpartum period, 80 to 100% of lactating dairy cows have bacterial contamination within their uteri. Presence of uterine bacteria may contribute to increased number of days open and services per conception within these cows. Expulsion of uterine contamination is crucial for uterine involution and reproductive health. Susceptibility to bacterial infection within the uterus can be attributed to a decrease in neutrophil function during the first two weeks of the postpartum period. Prostaglandin F2[alpha] (PGF2[alpha]) has been found to induce uterine contractility, increase neutrophil propagation and affect the uterine environment. The objective of this study was to determine the effects of a single injection of prostaglandin F2[alpha] (Lutalyse, Pfizer Animal Health, New York, NY) on uterine health and reproductive performance in dairy cows. Holstein cows from a commercial dairy were randomly assigned to receive an intramuscular injection of either Lutalyse or saline on Day 7 or 14 postpartum (Day 0= day of parturition). Services per conception and days open were evaluated to determine the effects on reproductive performance due to treatment. Cytobrush and uterine swabs were performed on a subset of Day 14 postpartum cows at 0 and 24 h after injection to evaluate changes in uterine neutrophil and bacterial populations. The pro-inflammatory cytokines known to induce mobilization of neutrophils, interleukin-1[beta], interleukin-6, and tumor necrosis factor-[alpha] were also measured at 0, 3, 6 and 12 h after injection of Lutalyse or saline on Day 14 postpartum to determine if PGF2[alpha] induced an increase in cytokines similar to initial pathogen detection. No significant differences were seen in days open, services per conception, interleukin-1[beta] or tumor necrosis factor-[alpha] concentrations. Interleukin-6 concentration was greater in saline cows at 12 h compared to Lutalyse treated cows at 3, 6 and 12 h after injection. Additionally, an increase in uterine neutrophils (P=0.05) and a decrease in bacteria (P=0.05) in response to Lutalyse were observed. Although PGF2[alpha] has been shown to have beneficial effects on the postpartum uterus, a single injection protocol may simply not be adequate to induce significant improvement in reproductive performance.
Download or read book Influence of Bull Exposure on Reproductive Performance of Postpartum Dairy Cows written by Khairiyah Binti Mat and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Postpartum Reproductive Function in Finnish Dairy Cows written by Kalevi Heinonen and published by . This book was released on 1988 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Negative Energy Balance in Postpartum Dairy Cows written by Witaya Suriyasathaporn and published by . This book was released on 2000 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Associations of Pre and Post partum Lying Time with Metabolic Status Health Survival and Performance of Dairy Cows written by Juan M. Piñeiro and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dairy cattle have strong behavioral need to rest and deprivation of their lying time (LT) has been associated with lameness and changes in feeding behavior and endocrinological milieu. However, the effects of LT during the transition period on metabolic stress, inflammation, health and performance have not yet been fully investigated. Therefore, the following tree specific aims were conducted. A total of 1052 Holstein cattle (401 nulliparous heifers and 651 parous cows) from 3 commercial dairy farms were enrolled for this prospective cohort study. The first aim (Chapter 3) was to evaluate the association of pre- and postpartum lying time (LT) on calcium and energy balance (NEFA and BHB), inflammation (haptoglobin and hemogram), and health status of dairy cows. Prepartum LT had significant quadratic association on serum NEFA concentration, but was not significantly associated with serum Ca concentration within 48 h after calving. Increased LT within 14 DIM was associated with increased risk of diagnosis with ketosis within 14 DIM, inflammation, and incidence of postpartum diseases. Findings from this study suggest that LT along with Ca and energy balance are critical for transition cow health. The second aim (Chapter 4) was to assess the association of post-partum LT on milk yield, components (milk fat and protein percentage), and somatic cell count (SCC). Milk yield at first DHIA test was not associated with LT within the first 14 DIM, but was negatively correlated with the daily coefficient of variation (CV) of LT within 14 DIM. However, health status was associated with milk yield and components, and health status was associated with LT within 14 DIM. The third aim (Chapter 5) was to evaluate the association of lying time (LT) within the first 14 days in milk (DIM) and health status on culling within 60 DIM, cyclicity, and reproductive performance. LT had a positive linear association with culling, for every hour increment of LT within 14 DIM the culling risk within 60 DIM increased by 1 percentage point, and negative quadratic association with cyclicity at 42 DIM. Multiparous cows with a LT of 9-13 h/d had greater probability of pregnancy up to 300 DIM compared to cows with a LT >13 h/d. These findings suggest that there is an optimum daily LT range for early postpartum cows housed in freestall barns, different than reported for mid lactation cows, with the potential for improved reproductive performance.
Download or read book Studies on the Reproductive Efficiency of Cattle Using Radioimmunoassay Techniques written by International Atomic Energy Agency and published by . This book was released on 1990 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a final research co-ordination meeting, Vienna, 5-9 September 1988. The 13 individual papers presented at the meeting are included in this publication and represent a synthesis of the work carried out under the co-ordinated research programme initiated in 1982 with the aim of stimulating studies to characterize and improve the reproductive performance of indigenous cattle under the diverse environmental and management conditions prevailing in developing countries.
Download or read book Artificial Insemination written by Deborah Y. Richardson and published by . This book was released on 1992 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iceland written by Francis R. McBride and published by Oxford, England : Clio Press. This book was released on 1996 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Republic of iceland, situated near the Arctic Circle, comprises one large island and numerous smaller ones. Iceland became independent in 1944 and is a founder-member of the Nordic Council, and a member of NATO and the Council for Europe. Iceland is the most geologically active country in the world, with geysers, volcanoes, hot springs, glaciers, and spectacular waterfalls. This descriptive, annotated bibliography provides an updated listing of significant books and articles about Iceland.
Download or read book Agrindex written by and published by . This book was released on 1993 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quick Bibliography Series written by and published by . This book was released on 1976 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1999 with total page 1846 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Early lactation Milk Yield on Dairy Cow Interval to conception written by Jane Little Harman and published by . This book was released on 1994 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Reproduction written by and published by . This book was released on 1991-07 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1987 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:
