Download or read book Using Prostaglandins in a Reproductive Management Program for Dairy Cattle written by R. L. Ax and published by . This book was released on 1980 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Prostaglandin as a Postpartum Reproductive Management Tool in Lactating Dairy Cattle written by Joel William Pankowski and published by . This book was released on 1994 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Epidemiologic Studies of the Use of Prostaglandin Products in Dairy Reproductive Herd Health Programs written by James Guthrie Wheeler Wenzel and published by . This book was released on 1990 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Prostaglandin Controlled Breeding Program for Dairy Cows written by Thurman Hornbuckle (II.) and published by . This book was released on 1991 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Efficiency Following Administration of an Inhibitor of Prostaglandin F2 alpha During Early Embryonic Development in Dairy Cattle written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A study was performed to examine the administration of flunixin meglumine (FM; an inhibitor of prostaglandin F2[alpha]) following artificial insemination on pregnancy rates of lactating dairy cattle. Jersey and Holstein cows (n=106) were randomly assigned to receive intravenously either FM (2.2 mg/kg BW) or saline (SAL; 1 mL/23 kg BW). Cows were randomly allotted to treatment by lactation number, bovine somatotropin administration, breed, BW, days in milk, milk production, and 305 ME milk production. Study was performed from September through April and all cows were milked twice daily. Following estrous synchronization (cloprostenol, 500 [mu]g im), cows were artificially inseminated 12 [plus or minus] 6 h after the onset of estrus was detected utilizing electronic monitoring. Administration of FM or SAL was administered 5 d [plus or minus] 12 h following artificial insemination. Animals underwent verification of pregnancy 28-35 d following artificial insemination using transrectal ultrasonography by an individual blinded to treatment. Pregnancy was determined by the presence or absence of an embryo with a heartbeat. Pregnancy data were analyzed using CRD Mixed ANOVA Analysis. Administration of FM following artificial insemination did not improve pregnancy rates in lactating dairy cows (FM, 37 vs SAL, 31.4%; P> 0.10). In conclusion, treatment with flunixin meglumine did not improve pregnancy rates when administered following artificial insemination in lactating dairy cows.
Download or read book Control of Intervals to First Service and Attempts to Improve Fertility in Dairy Cattle Using Prostaglandin F2 and Gonadotropin releasing Hormone written by Matthew Christian Lucy and published by . This book was released on 1985 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving Dairy Cattle Fertility written by Jennifer A. Spencer and published by . This book was released on 2014 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: In cattle, early embryonic loss may occur due to the premature secretion of prostaglandin F2a (PGF2a) during days 14-16 after fertilization. The objective of the first experiment in this study was to determine aspirin's effects on PGF2a during the luteal phase of the estrous cycle in lactating dairy cows by characterizing blood plasma prostaglandin metabolites (PGFM) and progesterone (P4) concentrations. Aspirin decreased PGFM for 30 hours after last bolus administration and increased the day to luteolysis. The objective of the second experiment was to determine the effectiveness of the initial gonadotropin-releasing hormone (GnRH) in a 5-day CIDR (controlled internal drug releasing inserts)-Cosynch resynchronization protocol on fertility to second insemination in lactating dairy cows. No differences in pregnancy rate per artificial insemination (PR/AI) were observed between no GnRH (treatment) and GnRH (control) for the second insemination. Indicating that GnRH may not be necessary at the initiation of a CIDR-Cosynch resynchronization protocol.
Download or read book Reproductive Response Factors of Dairy Cattle Treated with Cloprostenol written by Harry Walter Momont and published by . This book was released on 1985 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Management in Beef Cattle written by James A. Stotts and published by . This book was released on 1986 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bovine Reproduction written by Richard M. Hopper and published by John Wiley & Sons. This book was released on 2014-08-18 with total page 2206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Reproduction is a comprehensive, current reference providing information on all aspects of reproduction in the bull and cow. Offering fundamental knowledge on evaluating and restoring fertility in the bovine patient, the book also places information in the context of herd health where appropriate for a truly global view of bovine theriogenology. Printed in full color throughout, the book includes 83 chapters and more than 550 images, making it the most exhaustive reference available on this topic. Each section covers anatomy and physiology, breeding management, and reproductive surgery, as well as obstetrics and pregnancy wastage in the cow. Bovine Reproduction is a welcome resource for bovine practitioners, theriogenologists, and animal scientists, as well as veterinary students and residents with an interest in the cow.
Download or read book Improving Beef Cattle Reproductive Efficiency written by McKenzie R. Corpron and published by . This book was released on 2020 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Less than 10% of beef cow-calf producers in the United States currently implement reproductive technologies such as estrous synchronization and artificial insemination (AI) as a component of their breeding management program. Synchronization protocols aid in the synchrony of estrus and ovulation to improve cattle fertility, however, many protocols often require multiple hormone injections and animal handlings. Development of estrous synchronization protocols that limit number of injections, cost, and labor inputs, without compromising fertility, may improve the adoption of fixed-time artificial insemination (FTAI) within the beef industry. The main objective of the first study was to compare the effect of a single injection of high-concentration (HICON) prostaglandin F2[alpha] (PGF) or two conventional PGF injections (2PGF) administered 8 h apart at controlled internal drug release insert (CIDR) removal, on reducing serum progesterone (P4) before FTAI and on subsequent pregnancy per artificial insemination (P/AI) in postpartum beef cows (n=404) synchronized with a 5-d CO-Synch + CIDR breeding program. Serum P4 concentration at the time of insemination is a determining factor of cattle fertility in FTAI protocols, as lower concentrations have been associated with increased P/AI. A secondary objective of the first study was to assess the relationship between P4 concentration at the time of insemination and probability of pregnancy to AI. Progesterone concentrations at AI were lesser in 2PGF than HICON, however, P/AI was not different between treatments. Probability of pregnancy decreased as P4 concentration at AI increased and the optimal P4 cutoff concentration to optimize fertility was determined at 0.43 ng/mL. Intramuscular (i.m.) route of injection is commonly used to administer products used in estrous synchronization in beef cattle; however, this route causes greater incidence of injection-site lesions and tissue damage associated with reduced beef carcass quality and tenderness than subcutaneous (s.c.) routes. Therefore, use of s.c. administration is favorable to reduce carcass damage. The objective of the second study was to compare the ability of a single s.c. injection of high-concentration PGF (HICON-SC) with two i.m. injections of conventional PGF 6 h apart (2PGF-IM) to reduce P4 concentration and induce luteolysis by the time of AI in a 5-d CO-Synch + CIDR synchronization program in postpartum beef cows. A similar decline in P4 concentration occurred in both treatments following PGF, indicating s.c. administration of HICON could be an effective alternative to i.m. administration of the conventional double PGF dose to induce luteolysis before AI in the 5-d CO-Synch + CIDR protocol.
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 Effects of Early Postpartum Gonadotropin Releasing Hormone and Prostaglandin Administration on Postpartum Reproductive Activity and Ovulation Synchronization in Lactating Dairy Cows written by Amy Lou Tucker and published by . This book was released on 2001 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Herd Health And Production Management In Dairy Practice Indian Reprint written by Arie Brand and published by . This book was released on 2003-01-01 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rebhun s Diseases of Dairy Cattle written by Thomas J. Divers and published by Elsevier Health Sciences. This book was released on 2007-10-25 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: REBHUN'S DISEASES OF DAIRY CATTLE, 2nd Edition is your all-in-one guide to bovine disease management. With thorough, up-to-date coverage of differential diagnosis methods, surgical and therapeutic treatment options, and prevention strategies, it provides vital information for battling bovine diseases in both dairy and non-dairy cattle. The book is organized by body system for quick, convenient reference, and this new edition meets the growing need for management of both diseases of individual cows and problems affecting whole herds. Individual case presentations provide a valuable tool for differential diagnosis. Practical overviews for procedures such as blood transfusion, abdominal paracentesis, and ECG give you reliable support for some of the most common procedures in bovine care. Body systems organization makes diagnosis easier and more effective by isolating system-specific diseases and conditions. Full-color design and over 200 new photographs depict disease processes in realistic clarity and ensure the most accurate diagnosis and treatment. Emphasis on herd health addresses the dairy industry's increased concern over population medicine. Expanded coverage of lameness highlights key problem areas in bovine feet. Revised drug usage recommendations and legal considerations present the most current information in these critical areas to help you prevent dangerous or costly errors. Additional public health/safety considerations identify diseases that pose a substantial public threat and detail special measures for related care of dairy cattle. New, innovative DVD features real-time videos of neurologic case studies, ultrasound and endoscopy procedures, and imaging techniques that familiarize you with the latest technological equipment and protocols. Features coverage of the latest treatment innovations including antibiotic residue testing, care of individual metabolic disease, troubleshooting, and much more.
Download or read book Principles of Cattle Production written by Henry Swan and published by Butterworth-Heinemann. This book was released on 1976 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The structure of the british cattle industry. Syncronisation of oestrus and ovulation in cattle. Multiple ovulation, egg transplantation towards twinning. The physiological interrelationship os reproduction, lactation and nutrition in the cow. The influence of the climatic environment on metabolism in cattle. Energy supply from the digestive tract of cattle. Protein sysnthesis in the rumen: Its implication in the feeding of non-protein nitrogen to ruminants. Energy utilisation in the body. Amino acid supply as a limiting factor in milk and muscle synthesis. Nutritional influencing the efficiency of energy utilisation by beef and dairy cattle. Meeting the energy and protein requirements of the growting animal. Plane of nutrition for the dairy cow. Factors influencing voluntary food intake in cattle. Utilisation of grassland by dairy cows. Beef from grass and forage crops. Conserved forage - complement or competitor to concentrates. Selection for milk and beef characteristics - collateral or independent? The genetic implications of selecting cattle for large size. Practical beef cattle improvement. The future - milk versus beef or milk and beef.
Download or read book Bovine Medicine written by Anthony H. Andrews and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 1233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Medicine provides practical and comprehensive information oncattle disease and production and is a key reference for all largeanimal vets. Since the first edition was published in 1991 therehave been significant improvements in disease control andmanagement of cattle. Almost all parts of the book have beenupdated and completely rewritten. There are new chapters onsurgery, embryo transfer, artificial insemination, ethno-veterinarymedicine and biosecurity, and a new consolidating chapter on theinteraction between the animal, environment, management anddisease. The previous edition has sold all over the world, and as aresult of this a greater emphasis has been placed on conditions andtheir treatment in areas other than temperate regions. A newsection entitled "Global Variation in Cattle Practice" has beenincluded with contributors discussing bovine medicine practice intheir part of the world. All in all this is an outstanding resource for any practisingvet and an excellent reference for veterinary students.
