Impact of Progesterone Supplementation on Pregnancy Rates Following Timed Artificial Insemination Or Embryo Transfer in Beef Cattle Consuming Endophyte-Infected Tall Fescue PDF Download

Author: Joseph Christopher Mackey
Publisher:
ISBN:
Category :
Languages : en
Pages : 109

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Author: Melissa Steichen
Publisher:
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Category :
Languages : en
Pages : 42

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In previous research, progesterone has been supplemented using various techniques, at differing time points during peri-insemination in cattle, with conflicting results. Little research has been conducted on the effects of intravaginal delivery of supplemental progesterone following transfer of embryos produced in vitro, and no research was found to investigate this method exclusively in the period post-transfer. Pregnancy rates following the transfer of embryos produced in vitro are considered less than ideal, especially if these embryos have been cryopreserved. Embryos produced in vitro are less equipped to handle the freezing process due to alternative ultrastructural differences, and display lesser developmental potential in the post-transfer environment compared to embryos derived in vivo. The objective of this study was to evaluate the effect of a CIDR insert following the transfer of IVP embryos on pregnancy rates and circulating concentrations of progesterone of dairy heifer recipients.

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Languages : en
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In previous research, progesterone has been supplemented using various techniques, at differing time points during peri-insemination in cattle, with conflicting results. Little research has been conducted on the effects of intravaginal delivery of supplemental progesterone following transfer of embryos produced in vitro, and no research was found to investigate this method exclusively in the period post-transfer. Pregnancy rates following the transfer of embryos produced in vitro are considered less than ideal, especially if these embryos have been cryopreserved. Embryos produced in vitro are less equipped to handle the freezing process due to alternative ultrastructural differences, and display lesser developmental potential in the post-transfer environment compared to embryos derived in vivo. The objective of this study was to evaluate the effect of a CIDR insert following the transfer of IVP embryos on pregnancy rates and circulating concentrations of progesterone of dairy heifer recipients.

Author: Jacob Westley Thorne
Publisher:
ISBN:
Category :
Languages : en
Pages : 975

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This study was performed to test the viability of administering a single 40 mg dose of Folltropin-V® (FSH, Bioniche Animal Health) diluted in SRF (MAP-5 50, Sodium Hyaluronate, Bioniche Animal Health) on day 5 of a recipient synchronization protocol to beef cows to evaluate its effect on recipient fertility. All recipients were administered an estradiol 17beta (2.5 mg, IM) and progesterone (50 mg, IM) combination injection on day 0 and a CIDR® (progesterone 1.34 g, Pfizer Animal Health) was inserted. Lutalyse® (dinoprost tromethamine, Pfizer Animal Health, 25 mg, IM) was administered at the time of CIDR removal on day 7, and estradiol 17beta (1 mg, IM) was administered on day 8. On day 16, the presence of at least one corpus luteum (CL), detected via ultrasound, resulted in the recipient receiving an embryo (both fresh and frozen-thawed embryos were used). Embryos were not transferred into cows that did not show the presence of a CL. Dependent variables for which data were collected included circulating progesterone levels at the time of transfer, number of CLs and CL diameter, circumference, and area; measured in millimeters. The study (n=572) consisted of a treatment group (n=268) and a control group (n=304), and included both Bos indicus (Brahman influenced) crossbred (n=115) and Bos taurus (Angus based) cows (n=457). Pregnancy rates for Treated recipients (40.67%A) and Control recipients (52.96%B) differed (P

Author:
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Category : Agriculture
Languages : en
Pages : 1960

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Author:
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Category : Agriculture
Languages : en
Pages : 720

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Author: Steven P. Brinsko
Publisher: Elsevier Health Sciences
ISBN: 0323065139
Category : Medical
Languages : en
Pages : 336

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Now in full color, Manual of Equine Reproduction, 3rd Edition provides a comprehensive look at the reproductive management of horses, including management of stallions, pregnant mares, and neonatal foals. Expert authors use a concise, practical approach in discussing improved therapies and treatments in equine breeding. You’ll enhance your skills and knowledge with this book’s detailed coverage of techniques used in reproductive examination, breeding procedures, pregnancy diagnosis, foaling, and reproductive tract surgery. A clinical emphasis includes a step-by-step format of possible scenarios from conception to breeding management. Practical information includes topics such as breeding with transported cooled or frozen semen, and caring for the broodmare and newborn foal. The organization of material corresponds to the course of study in veterinary school, so you can find topics easily. Chapter objectives and study questions at the beginning of each chapter guide you through the material and provide clear learning goals. Evaluation of Breeding Records chapter covers the importance of breeding records, and how to use them to evaluate stallion performance and optimize fertility. References are listed at the end of each chapter for further research and study. Full-color photographs and illustrations clearly depict procedures, and all drawings have been redrawn and improved. NEW Assisted Reproductive Technology chapter goes beyond embryo transfer. Updated content includes the latest advances in therapies and treatments. New content is added to two chapters, Reproductive Physiology of the Nonpregnant Mare and Manipulation of Estrus in the Mare. Thorough coverage of every aspect of equine reproduction provides a strong foundation for success in veterinary practice, including a discussion of the use of GnRH-analog deslorelin (Ovuplant) to hasten ovulation; aseptic technique for endometrial biopsy; use of transabdominal ultrasonography, especially in early pregnancy; determination of fetal gender by transrectal ultrasonography; aspiration testicular biopsy using a spring-loaded biopsy instrument; and procedure for surgical embryo transfer.

Author: Robert S. Youngquist
Publisher: Elsevier Health Sciences
ISBN: 1437713408
Category : Medical
Languages : en
Pages : 1088

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An essential resource for both students and practitioners, this comprehensive text provides practical, up-to-date information about normal reproduction and reproductive disorders in horses, cattle, small ruminants, swine, llamas, and other livestock. Featuring contributions from experts in the field, each section is devoted to a different large animal species and begins with a review of the clinically relevant aspects of the reproductive anatomy and physiology of both males and females. Key topics include the evaluation of breeding soundness, pregnancy diagnosis, diagnosis and treatment of infertility, abortion, obstetrics, surgery of the reproductive tract, care of neonates, and the latest reproductive technology. Includes coverage of all large animal species. All sections provide a review of clinically pertinent reproductive physiology and anatomy of males and females of each species. Complete coverage of the most current reproductive technology, including embryo transfer, estrous synchronization, and artificial insemination. A new section on alternative farming that addresses reproduction in bison, elk, and deer. New to the equine section: stallion management, infertility, and breeding soundness evaluation. New to the bovine section: estrous cycle synchronization, reproductive biotechnology, ultrasonographic determination of fetal gender, heifer development, and diagnosis of abortion. New to the porcine section: artificial insemination, boar/stud management, diseases of postpartum period, and infectious disease control. New to the llama section: infectious disease and nutrition.

Author: Robert Blair
Publisher: CABI
ISBN: 1789245559
Category : Technology & Engineering
Languages : en
Pages : 245

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Organic cattle farming is on the increase, with consumer demand for organic milk and meat growing yearly. Beginning with an overview of the aims and principles behind organic cattle production, this book presents extensive information about how to feed cattle so that the milk and meat produced meet organic standards, and provides a comprehensive summary of ruminant digestive processes and nutrition. Since the publication of the first edition, global consumers have increasingly become concerned with the sustainability of meat production. Here, Robert Blair considers the interrelationships of sustainable practices and profitability of organic herds, reviewing how to improve forage production and quality, and minimizing the need for supplementary feeding using off-farm ingredients.

Author: Konnie Plumlee
Publisher: Elsevier Health Sciences
ISBN: 0323058345
Category : Medical
Languages : en
Pages : 495

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This book covers all aspects of toxicology, including toxic diseases of large animals, small animals, and exotic pets. It provides key information on how poisons affect the body, how the body responds to a foreign substance, how poisonings are diagnosed, and how poisonings are treated. Coverage includes every organ system of every species of animal with details on each body system's susceptibility to poison. Poisons affect animals differently depending on species, breed, age, gender, health status, and reproductive status. This resource addresses these differences, allowing the veterinarian to determine the class of toxicant, the mechanism of action, and the proper course of treatment. If confronted with an unknown poison, the information in this book will assist the veterinarian in formulating a list of potential poisons based on the clinical signs that the animal is exhibiting, and in choosing the appropriate tests to narrow the list to one or a few possible poisons. - Most comprehensive toxicology book available - Written in a user-friendly style that makes it easy to master the content - Covers poisonings in both large and small domestic animals - The Principles of Toxicology section provides comprehensive coverage of concepts & terminology, toxicokinetics, treatments, and regulatory information - The Manifestations of Toxicoses section is devoted to differentiating between poisons based on lesions and clinical signs - The Classes of Toxicants section offers detailed information on each poison, including sources, risk factors, pathophysiology, clinical signs and lesions, diagnostic testing, and treatment - The author is board-certified in toxicology, and the contributors are all toxicologists and educators, ensuring authoritative, up-to-date clinical information