Download or read book Ovulation Fertility and Endocrine Response After Prostaglandin F2 in Cattle written by Thomas Michael Louis and published by . This book was released on 1975 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Hormonal Steroids written by V. H. T. James and published by Elsevier. This book was released on 2013-10-22 with total page 1073 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hormonal Steroids presents the proceedings of the Sixth International Congress on Hormonal Steroids, held in Jerusalem, Israel in September 1982. The book covers a wide range of topics on the field of hormonal steroids research. The topics discussed include the history of steroid-protein interaction; enzyme induction by estrogen; steroids and the immune system; correlative morphological and biochemical investigations on the stromal tissue of the human prostate; analysis of intact steroid conjugates by secondary ion mass spectrometry (including fabms) and by gas chromatography; and the role of lipoproteins in steroidogenesis by human luteinized granulosa cells in culture. Biochemists, pathologists, pharmacologists, and medical and pharmaceutical researchers will find the book a good source of insight.
Download or read book Theriogenology written by and published by . This book was released on 1980 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international journal of animal reproduction.
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 Journal of the American Veterinary Medical Association written by and published by . This book was released on 1995 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproduction in Cattle written by Peter J. H. Ball and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cattle play a fundamental role in animal agriculture throughout the world. They not only provide us with a vital food source, but they also provide us with fertilizer and fuel. Keeping reproduction levels at an optimum level is therefore essential, but this is often a complicated process, especially with modern, high yielding cows. Written in a practical and user-friendly style, this book aims to help the reader understand cattle reproduction by explaining the underlying physiology of the reproductive process and the role and importance of pharmacology and technology, and showing how management techniques can improve reproductive efficiency. This edition includes: Recent research findings on the physiology of the oestrous cycle and its control; New techniques for monitoring and manipulating reproduction, including pregnancy diagnosis and embryo transfer; Advice on identifying common infertility problems and how to prevent and treat them. Reproduction Cattle 3e is essential reading for veterinary and agricultural students, as well as veterinarians and farmers involved in cattle reproduction.
Download or read book Tropical Agriculture written by and published by . This book was released on 1989 with total page 406 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 2000 with total page 1844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1974 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Endocrinology written by P. Jorge Chedrese and published by Springer Science & Business Media. This book was released on 2009-06-13 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular biology emerged from advances in biochemistry during the 1940s and 1950s, when the structure of the nucleic acids and proteins were elucidated. Beginning in the 1970s, with nucleic acid enzymology and the discovery of the restriction enzymes, the tools of molecular biology became widely available and applied in cell biology to study how genes are regulated. This new knowledge impacted endocrinology and reproductive biology since it was largely known that the secretion of the internal glands affected the phenotypes, and expression of genes. Modern reproductive biology encompasses every level of biological study from genomics to ecology, encompassing cell biology, biochemistry, endocrinology and general physiology. All of these disciplines require a basic knowledge, both as a tool and as an essential aid to a fundamental understanding of the principles of life in health and disease. Overall, molecular biology is central to scientific studies in all living matter, impacting disciplines such as medicine, related health sciences, veterinary, agriculture and environmental sciences. In this book, the basic biochemistry of nucleic acids and proteins are reviewed. Methodologies used to study signaling and gene regulation in the endocrine/reproductive system are also discussed. Topics include mechanisms of hormone action and several endocrine disorders affecting the reproductive system. Professionals in the medical, veterinary and animal sciences fields will find exciting and stimulating material enhancing the breadth and quality of their research.
Download or read book Population Sciences written by and published by . This book was released on 1979 with total page 764 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 2021-04-30 with total page 1232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bovine Reproduction A complete resource for practical, authoritative information on all aspects of bovine theriogenology The newly revised Second Edition of Bovine Reproduction delivers a comprehensive overview of all major issues in bovine reproduction. Written by leading experts in the subject, the book is an indispensable reference for any veterinarian dealing with bovine fertility. Bovine Reproduction is divided into sections on the bull, the cow, the neonate, and assisted reproduction techniques. New chapters cover new gene manipulation technologies, managing problem donors, lameness, and more. Outdated and redundant information from the First Edition has been removed and replaced by coverage of new diseases, technologies, procedures, techniques, and approaches to fertility problems. A new companion website provides images and tables from the book in PowerPoint format. In addition to more than 675 full-color images, readers will also benefit from: A thorough discussion of the anatomy and physiology of the bull, including the endocrine and exocrine function of bovine testes and the thermoregulation of the testes An exploration of breeding and health management of bulls, including the evaluation of breeding soundness and ultrasound examination of the reproductive tract An examination of the anatomy, physiology, and the breeding and health management of cows, including fetal programming, the reproductive tract microbiome, and a section on obstetrics and reproductive surgery A review of the management of both critical care of the neonate and effective colostrum assessment and provision An introduction to assisted and advanced reproductive technologies A practical and comprehensive reference, Bovine Reproduction is a must-have purchase for bovine practitioners, theriogenologists, animal scientists, veterinary students, and residents with an interest in cattle.
Download or read book Index Veterinarius written by and published by . This book was released on 1988 with total page 1210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Awards Index written by and published by . This book was released on 1976 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Reproduction and Fertility written by and published by . This book was released on 1996 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the Proceedings of the Society for the Study of Fertility.
Download or read book Research Grants Index written by National Institutes of Health (U.S.). Division of Research Grants and published by . This book was released on 1973 with total page 1130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
