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Modifications Of The Select Synch Protocol For Estrus Synchronization In Beef Cows And Heifers
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Book Synopsis Modifications of the Select Synch Protocol for Estrus Synchronization in Beef Cows and Heifers by : Oliver Tyson Jones
Download or read book Modifications of the Select Synch Protocol for Estrus Synchronization in Beef Cows and Heifers written by Oliver Tyson Jones and published by . This book was released on 2003 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of CIDR-based Protocols to Synchronize Estrus in Beef Heifers by : Nicole Renee Leitman
Download or read book Comparison of CIDR-based Protocols to Synchronize Estrus in Beef Heifers written by Nicole Renee Leitman and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Estrus synchronization and artificial insemination (AI) are reproductive management techniques that allow beef producers to enhance the reproductive efficiency and genetic composition of their cow herd. However, U.S. beef producers have been reluctant to adopt these reproductive management tools, largely due to time and labor. Recent research to synchronize estrus, therefore, has focused on the development of estrus synchronization protocols that facilitate fixed-time AI (FTAI). Although protocols have been developed that allow the successful use of FTAI in beef cows, the same degree of success in beef heifers has not been realized. Additionally, no published research has focused on characterizing the physiological responses to long- and short-term CIDR-based protocols in beef heifers. Experiment 1 evaluated ovulatory response to GnRH and synchrony of estrus and ovulation after PGF2[alpha] (PG) in beef heifers. The CIDR Select and Select Synch + CIDR protocols were evaluated among estrous cycling and prepubertal beef heifers and the CIDR-PG and Select Synch protocols were evaluated among estrous cycling beef heifers. A reduced variance for the intervals to estrus and ovulation was detected for estrous cycling heifers treated with the CIDR Select protocol in comparison to the other 3 treatments. The combined results of the estrous cycling and prepubertal heifers revealed an increased ovulatory response to GnRH for heifers treated with the CIDR Select protocol compared to the Select Synch + CIDR protocol, which ultimately resulted in a reduced variance for interval to estrus and ovulation after PG. Furthermore, no differences within treatment were detected in the variance for interval to estrus or ovulation among estrous cycling and prepubertal heifers treated with the CIDR Select protocol. These results suggest that the CIDR Select protocol may facilitate FTAI more effectively in mixed groups of estrous cycling and prepubertal beef heifers. Experiments 2 and 3 evaluated modifications to the CIDR Select protocol. Estrous cycling beef heifers were used in Exp. 2. The hypothesis tested was that reducing the interval from CIDR removal to GnRH administration by 2 d would facilitate an improvement in the synchrony of estrus after PG. Although a larger number of heifers that were assigned to the 28 d protocol were on d 5 and 6 at the time GnRH was administered, response to GnRH was not improved and synchrony of estrus was not enhanced following PG. In Exp. 3, a second modification to the CIDR Select protocol was evaluated using estrous cycling and prepubertal beef heifers. The hypotheses tested were: 1) reducing the interval from CIDR removal to GnRH may facilitate an improvement in the synchrony of estrus after PG, and 2) the addition of GnRH following CIDR removal is required to improve the synchrony of estrus after PG. Although no difference in estrous response was detected, mean intervals to estrus and variance for interval to estrus differed based on the interaction of treatment length, GnRH, and estrous cyclicity status. The results from Exp. 3 clearly suggest that further evaluation of long-term CIDR-based protocols is required.
Book Synopsis Comparison of Progestin Based Protocols to Synchronize Estrus and Ovulation in Beef Cows by : Daniel Joseph Schafer
Download or read book Comparison of Progestin Based Protocols to Synchronize Estrus and Ovulation in Beef Cows written by Daniel Joseph Schafer and published by . This book was released on 2005 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synchronization of Estrus Or Ovulation Using HCG Or GNRH with the Select Synch Or Co-Synch Protocols in Suckled Beef Cows by : Robin Rae Salverson
Download or read book Synchronization of Estrus Or Ovulation Using HCG Or GNRH with the Select Synch Or Co-Synch Protocols in Suckled Beef Cows written by Robin Rae Salverson and published by . This book was released on 2000 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Controlled Internal Drug Release (CIDR)-based Protocols to Synchronize Estrus and Facilitate Artificial Insemination (AI) in Postpartum Beef Cows by : Dallas James Wilson
Download or read book Comparison of Controlled Internal Drug Release (CIDR)-based Protocols to Synchronize Estrus and Facilitate Artificial Insemination (AI) in Postpartum Beef Cows written by Dallas James Wilson and published by . This book was released on 2008 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artificial insemination (AI) and estrous synchronization are reproductive technologies that enable beef producers to efficiently improve herd genetics. The recent development of protocols designed to synchronize estrus and ovulation enable producers to utilize fixed-time AI (FTAI), thus reducing time and labor required to detect estrus. The 7-d Select Synch and CO-Synch + CIDR protocols provide an efficient and effective means to synchronize estrus in postpartum beef cows. Recently a 5-d Select Synch and CO-Synch + CIDR protocol was developed. To date, however, the literature is devoid of information comparing the 7-d and 5-d protocols on the basis of their practical application in the field. Experiment 1 was designed to fully characterize and compare the 7-d and 5-d Select Synch + CIDR protocols. There were no differences between treatments for estrous response, interval to estrus, or the variance for interval to estrus. Additionally, response to GnRH and follicle size at GnRH did not differ between the two treatments, nor were there any differences in synchronized conception or pregnancy rates resulting from AI. Experiment 2 was designed to compare pregnancy rates resulting from fixed-time AI following administration of the 7-d and 5-d CO-Synch + CIDR protocols with FTAI at 66 and72 h. There was no effect of treatment, technician, sire, or location on FTAI pregnancy rates. The results from these experiments indicate that the 7-d and 5-d Select Synch and CO-Synch + CIDR protocols performed comparably on the basis of synchronizing estrus and facilitating pregnancy resulting from FTAI, respectively.
Book Synopsis A Comparison of Co-Synch + CIDR and ECP + CIDR as Estrus Synchronization Techniques for Timed Artificial Insemination of Beef Heifers by : Morgan J. Roberts
Download or read book A Comparison of Co-Synch + CIDR and ECP + CIDR as Estrus Synchronization Techniques for Timed Artificial Insemination of Beef Heifers written by Morgan J. Roberts and published by . This book was released on 2010 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted as an estrus synchronization technique comparison. The objective of this study was to compare the effectiveness of two different estrus synchronization protocols for use in beef heifers. Two CIDR based protocols were utilized in this study, Co-Synch + CIDR (progesterone, gonadotrophin releasing hormone, and prostaglandin) and ECP + CIDR (Estradiol Cypionate, progesterone, prostaglandin, and gonadotrophin releasing hormone). 65 heifers were located on the same farm, however, were separated into three groups for handling ease (Group 1=21, Group 2-23, and Group 3=21). 42 heifers (Group 1=21, Group 2=11, and Group 3=10 were synchronized using the Co-Synch + CIDR technique. Heifers were administered a 2.0 ml injection of GnRH at the time of CIDR insertion. The CIDR implants remained in the heifers for 7 days. A 5.0 ml injection of PGF was administered at the time of CIDR removal. Removal was followed by TAI 52 hours later. At the time of AI heifers received another injection of GnRH. 23 heifers (Group 2=12 and Group 3=11) received the ECP + CIDR protocol. Each heifer received a 0.5 ml injection of ECP at time of CIDR insertion. CIDR remained in heifers for 7 days. All heifers were administered a 5.0 ml shot of PGF at time of CIDR removal. 52 hours after removal, heifers were TAI and were given an injection of GnRH. Conception rates of 57.1%, 18.2 % and 60.0% were achieved with the Co-Synch + CIDR protocol after time artificial insemination. ECP + CIDR resulted in conception rates of 33.3% and 90.9% after timed artificial insemination.
Book Synopsis Use of Synchromate-B Treatment for Estrus Synchronization in Beef Cows and Heifers and Its Subsequent Effect on Reproductive Performance by : Johnnie Russell Vaughan
Download or read book Use of Synchromate-B Treatment for Estrus Synchronization in Beef Cows and Heifers and Its Subsequent Effect on Reproductive Performance written by Johnnie Russell Vaughan and published by . This book was released on 1977 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Long-term Progestin-based Protocols to Synchronize Estrus in Beef Heifers by : Daniel A. Mallory
Download or read book Comparison of Long-term Progestin-based Protocols to Synchronize Estrus in Beef Heifers written by Daniel A. Mallory and published by . This book was released on 2009 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiment 1 evaluated two long-term progestin-based and controlled internal drug release estrus synchronization protocols to determine their potential to facilitate fixed-time artificial insemination in estrous cycling and prepubertal beef heifers. Conception to AI, AI pregnancy, and final pregnancy rates did not differ between treatments. Experiment 2 compared two long-term progestin-based estrus synchronization protocols to evaluate their potential to facilitate fixed-time artificial insemination in estrous cycling and prepubertal beef heifers. Estrous response after PG was greater among CIDR treated heifers compared to MGA treated heifers. Conception to AI, AI pregnancy, and final pregnancy rates did not differ between treatments. In summary, the long-term CIDR protocol compared favorably with the MGA protocol. Experiment 3 was conducted to compare pregnancy rates resulting from fixed-time AI after administration of either one of two long-term CIDR-based protocols. CIDR-GnRH-PG and CIDR-PG treated heifers were fixed-time inseminated at 72 or 66 hr after PG, respectively. Fixed-time AI pregnancy rates tended to be higher among CIDR-PG compared to CIDR-GnRH-PG treated heifers. Final pregnancy rates did not differ between treatments. In summary, both long-term progestin-based protocols were effective in synchronizing estrus prior to fixed-time AI in beef heifers.
Book Synopsis Evaluation of Long-term CIDR-based Estrus Synchronization Protocols in Primiparous Two-year-old Beef Cows by : Jillian Mae Abel
Download or read book Evaluation of Long-term CIDR-based Estrus Synchronization Protocols in Primiparous Two-year-old Beef Cows written by Jillian Mae Abel and published by . This book was released on 2015 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development and comparison of strategies designed to enhance reproductive management of primiparous two-year-old beef cows coincide with the recent increase in heifer retention and the significant number of younger age females that are now entering the U.S. cow herd. Reproductive management of primiparous two-year-old cows presents a unique challenge in managing a beef herd, since this age group of females typically experiences the highest incidence of reproductive failure. Strategic management of replacement beef heifers and primiparous cows is necessary to ensure their continued long-term reproductive success, which provides the opportunity for beef producers to increase retention rates, reduce input costs, and ultimately enhance production efficiency. Estrus synchronization and artificial insemination (AI) are important management tools available to producers that facilitate genetic improvement and enhance reproductive efficiency. A list of recommended protocols may be used to facilitate fixed-time AI (FTAI) in beef cows and heifers, and we now know that specific protocols perform better among various age classes of females. Short-term controlled internal drug release (CIDR)-based protocols are currently the preferred method to synchronize estrus prior to FTAI in postpartum beef cows. Alternatively, long-term CIDR-based protocols have been used with greater success in beef heifers. Progestin-based estrus synchronization protocols offer the potential to induce estrous cyclicity in anestrous postpartum cows and advance conception date. Experiment 1 was designed to compare the 14-d CIDR-PG (14-d) and 7-d CO-Synch + CIDR (7-d) protocols on the basis of estrous response, pregnancy rates after fixed-time AI (FTAI), and final pregnancy in primiparous two-year-old cows. Cows assigned to 14-d (n = 355) received a CIDR insert on Day 0 with removal on Day 14. Cows assigned to 7-d (n = 349) received GnRH and CIDR inserts on Day 23. On Day 30 CIDRs were removed from 7-d cows and PGF2[alpha] was administered to all cows in each treatment. On Day 33, 66 and 72 h after PGF2[alpha], GnRH was administered concurrent with FTAI. Estrous response at FTAI was higher for 7-d compared to 14-d cows (74% vs 43%, respectively; P
Book Synopsis Synchronization of Estrus in Beef Heifers and Cows with GnRH And/or CIDR-based Protocols by : Gonzalo Barquero
Download or read book Synchronization of Estrus in Beef Heifers and Cows with GnRH And/or CIDR-based Protocols written by Gonzalo Barquero and published by . This book was released on 2004 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparison of Long-term CIDR-based Protocols to Synchronize Estrus in Postpartum Beef Cows by : Justin Michael Nash
Download or read book Comparison of Long-term CIDR-based Protocols to Synchronize Estrus in Postpartum Beef Cows written by Justin Michael Nash and published by . This book was released on 2011 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estrus synchronization and artificial insemination are two of the most important management practices available to producers to increase reproductive performance in a beef cow-calf operation. Unfortunately, a small number of producers utilize these practices due to increased labor requirements. The use of fixed-time artificial insemination (FTAI) reduces the amount of time and labor required to detect estrus, leading to decreased input requirements. The following experiments were performed in order to compare the use of long-term controlled internal drug release (CIDR) insert-based estrus synchronization protocols prior to FTAI in estrous-cycling and anestrous postpartum beef cows. In experiments 1 and 2, two long-term CIDR-based estrus synchronization protocols were compared on the basis of physiological characteristics, including serum steroid hormone concentrations, estrous response, and follicular dynamics, as well as pregnancy rates resulting from FTAI. From these intensive trials, it was determined that both protocols yielded comparable pregnancy rates and similar physiological responses when used in postpartum beef cows. In experiment 3, the use of either a long- or short-term CIDR-based estrus synchronization protocol was compared prior to FTAI in a large-scale field trial. Results indicated that pregnancy rate resulting from FTAI was similar for both protocols. These data provide preliminary support for the use of long-term CIDR-based estrus synchronization protocols prior to FTAI in postpartum beef cows.
Book Synopsis Economic Implications of Estrus Synchronization Protocol Choice in a University Cattle Herd by : Haile Elizabeth Townsend
Download or read book Economic Implications of Estrus Synchronization Protocol Choice in a University Cattle Herd written by Haile Elizabeth Townsend and published by . This book was released on 2017 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to produce a cost-benefit analysis comparing the economic outcome of a fixed-timed artificial insemination (FTAI) estrus synchronization protocol to other methods using estrus detection. Angus and Simmental, crossbred cows (n = 88) managed at the Illinois State University (ISU) research farm (Lexington, IL) were randomly assigned to one of three treatment protocols: 7-day CoSynch plus CIDR, Select Synch plus CIDR and Select Synch. The CoSynch regimen (FTAI) included (n = 29): GnRH (Cystorelin RTM) at 2.0 mL (I.M.) and progesterone (CIDR) at 1.38 g (intravaginal) on day 0; PGF2alpha (LutalyseRTM) at 5.0 mL (I.M.) on day 7; GnRH at 2.0 mL (I.M.) 60 to 66 hours post PGF2alpha ; and timed artificial insemination (TAI) at the time of the second GnRH administration. The Select Synch with CIDR regimen (SSC) included the same drug administration as the CoSynch protocol with the exception of the second dose of GnRH. Cows (n = 29) received AI at the time of detected estrus following the application of a heat detection patch and administration of PGF2alpha. The Select Synch regimen (SS) included (n = 29): GnRH at 2.0 mL (I.M.) on day 0; PGF2alpha at 5.0 mL (I.M.) and heat patch on day 7; and AI at the time of estrus detection following PGF 2alpha. Cost-benefit analysis included cost of time and labor, AI supplies, protocol products, pregnancy diagnosis, clean-up bulls, and culling. Pregnancy rates were similar between all three protocols (P = 0.7032). Net cost was calculated by subtracting the returns received following cull sales and average calf prices per treatment, from the net cost of each protocol. Net cost during the field study for the FTAI regimen was $169.46/cow, $173.38/cow for the SSC regimen, and $162.59/cow following the SS protocol (P
Book Synopsis Evaluation of Two Modifications to Estrous Synchronization Protocols Utilizing Gonadotropin Releasing Hormone and Prostaglandin (CO-Synch and Select Synch) by : Holly A. Foster
Download or read book Evaluation of Two Modifications to Estrous Synchronization Protocols Utilizing Gonadotropin Releasing Hormone and Prostaglandin (CO-Synch and Select Synch) written by Holly A. Foster and published by . This book was released on 2001 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Animal Agriculture by : Fuller W. Bazer
Download or read book Animal Agriculture written by Fuller W. Bazer and published by Academic Press. This book was released on 2019-10-25 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Animal Agriculture: Sustainability, Challenges and Innovations discusses the land-based production of high-quality protein by livestock and poultry and how it plays an important role in improving human nutrition, growth and health. With exponential growth of the global population and marked rises in meat consumption per capita, demands for animal-source protein are expected to increase 72% between 2013 and 2050. This raises concerns about the sustainability and environmental impacts of animal agriculture. An attractive solution to meeting increasing needs for animal products and mitigating undesirable effects of agricultural practices is to enhance the efficiency of animal growth, reproduction, and lactation. Currently, there is no resource that offers specific knowledge of both animal science and technology, including biotechnology for the sustainability of animal agriculture for the expanding global demand of food in the face of diminishing resources. This book fills that gap, giving readers all the necessary information on important issues facing modern animal agriculture, namely its sustainability, challenges and innovative solutions. - Integrates new knowledge in animal breeding, biotechnology, nutrition, reproduction and management - Addresses the urgent issue of sustainability in modern animal agriculture - Provides practical solutions on how to solve the current and future problems that face animal agriculture worldwide
Book Synopsis Biotechnologies Applied to Animal Reproduction by : Juan Carlos Gardón
Download or read book Biotechnologies Applied to Animal Reproduction written by Juan Carlos Gardón and published by CRC Press. This book was released on 2020-11-01 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume focuses on recent trends and new technologies used in the management of reproduction in major farm animals, focusing on both males and females of bovine, equine, and porcine species. With chapters written by scientists who specialize in their respective topics, the volume presents a selection of different technologies that have been developed to assure reproductive success by improving reproductive efficiency, generating germplasm banks, and maintaining genetic diversity in cattle, horses, and pigs. In the last decade, reproductive technologies in veterinary medicine have progressed considerably, providing high profitability to livestock farms. This book provides basic and applied information on the most used reproductive technologies in bovine, equine, and porcine species for academics, scientists, and veterinarians. The volume discusses reproductive and postpartum management, reproductive ultrasound, sperm management, egg retrieval, artificial insemination, embryo transfer, nutrition, genetics, and certain clinical aspects, such as endocrinology and robustness of reproductive systems.
Book Synopsis Training Manual for Embryo Transfer in Cattle by : George E. Seidel
Download or read book Training Manual for Embryo Transfer in Cattle written by George E. Seidel and published by Australian Geographic. This book was released on 1991 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Artificial Insemination in Farm Animals by : Milad Manafi
Download or read book Artificial Insemination in Farm Animals written by Milad Manafi and published by . This book was released on 2011 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Artificial insemination is used instead of natural mating for reproduction purposes and its chief priority is that the desirable characteristics of a bull or other male livestock animal can be passed on more quickly and to more progeny than if that animal is mated with females in a natural fashion. This book contains under one cover 16 chapters of concise, up-to-date information on artificial insemination in buffalos, ewes, pigs, swine, sheep, goats, pigs and dogs. Cryopreservation effect on sperm quality and fertility, new method and diagnostic test in semen analysis, management factors affecting fertility after cervical insemination, factors of non-infectious nature affecting the fertility, fatty acids effects on reproductive performance of ruminants, particularities of bovine artificial insemination, sperm preparation techniques and reproductive endocrinology diseases are described. This book will explain the advantages and disadvantages of using AI, the various methodologies used in different species, and how AI can be used to improve reproductive efficiency in farm animals.
