Inducing Double Ovulations In Beef Cattle Via Simultaneous Luteal Regression And Follicle Wave Emergence In A Low Progesterone Environment

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Inducing Double Ovulations in Beef Cattle Via Simultaneous Luteal Regression and Follicle Wave Emergence in a Low Progesterone Environment

Author : Emma M. Jinks
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (435 download)

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Book Synopsis Inducing Double Ovulations in Beef Cattle Via Simultaneous Luteal Regression and Follicle Wave Emergence in a Low Progesterone Environment by : Emma M. Jinks

Download or read book Inducing Double Ovulations in Beef Cattle Via Simultaneous Luteal Regression and Follicle Wave Emergence in a Low Progesterone Environment written by Emma M. Jinks and published by . This book was released on 2009 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Since cattle are primarily monovular and produce only one calf per year, the cost of production for a cow-calf enterprise lies mostly in maintaining breeding stock. The overall goal in this field of research is to develop a pharmacological method to induce double ovulations in beef cattle and reduce production costs. Our objective was to study the effect of progesterone (P4) concentrations prior to emergence of a new follicular wave on the incidence of double ovulations. On d 0 of the experiment 19 cows received an intravaginal progesterone releasing device (CIDR) along with an estradiol benzoate injection to initiate follicle wave emergence approximately 3.5 d later. Prostaglandin F2[alpha] was administered on both d 0 and d 3.5 to establish a low P4 treatment (LP4, n=12) or only on d 3.5 to achieve a high P4 treatment (HP4, n=7). The CIDR were removed on d 3.5. Blood samples were collected from all animals throughout the experiment to measure circulating P4 concentrations. Ovarian structures were monitored via transrectal ultrasonography and ovulation was induced with gonadotropin releasing hormone when the largest follicle measured>= 12 mm in diameter. A new wave of follicles was observed in 17 cows and the mean day of follicle wave emergence did not differ between treatments (d 3.7 " 0.2). Concentrations of P4 in the HP4 treatment were approximately 125% greater than in the LP4 treatment from d 1 through d 3.5. All animals ovulated a single follicle with the exception of one animal in each treatment that ovulated two follicles. The mean follicle diameter at ovulation (11.9 " 0.3 mm) and mean interval to ovulation (5.7 " 0.1 d) did not differ between treatments. We conclude that P4 concentrations preceding the emergence of a new follicle wave did not influence the incidence of double ovulations.

Factors Responsible for the Occurrence of Double Ovulations and Development of a System to Induce Double Ovulations in Beef Cattle

Author : Lucas A. Helser
Publisher :
ISBN 13 :
Total Pages : 280 pages
Book Rating : 4.:/5 (184 download)

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Book Synopsis Factors Responsible for the Occurrence of Double Ovulations and Development of a System to Induce Double Ovulations in Beef Cattle by : Lucas A. Helser

Download or read book Factors Responsible for the Occurrence of Double Ovulations and Development of a System to Induce Double Ovulations in Beef Cattle written by Lucas A. Helser and published by . This book was released on 2007 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: An unexpected discovery from a previous study in our lab revealed that the incidence of double ovulations in cattle was approximately 50% when luteal regression was induced concurrent with follicle wave emergence; following ultrasound-guided follicular aspiration. Experiment 1 was conducted with the aim of identifying endocrine and/or follicular characteristics that led to development of double ovulations when this approach was taken. The hypothesis in the first experiment was that the decrease in progesterone as a result of luteal regression would induce enhanced or prolonged FSH which, in turn, would increase the occurrence of double ovulations. In the first experiment, 26 beef cows were synchronized to a common day of estrus and all follicles >̲ 5 mm in diameter were aspirated approximately 7 days later (d 0 of the experiment). Luteal regression was induced on d 1.5 and 2 of the experiment, concurrent with new follicle wave emergence, in half of the animals (PG; n = 13). The other 13 females were designated as controls and received no further treatment. Blood samples were collected from all animals during the course of the experiment to measure concentrations of FSH, LH, estradiol, and progesterone. Transrectal ultrasonography was conducted once daily to evaluate all ovarian structures. Double ovulations occurred in 5/12 (42%) animals in the PG treatment. Concentrations of FSH in serum were similar between the PG and Control treatments. Within the PG treatment, FSH did not differ between groups of animals that double ovulated (PG-DO) and single ovulated (PG-SO). Concentrations of LH were greater in PG-DO compared to PG-SO over the course of the experiment (group; P 0.05). Diameter of the dominant follicle (DF1) was greater over the course of the experiment in the PG-DO group (group; P

Synchronization of Follicular Wave Emergence, Luteal Regression, and Ovulation for Fixed-time Artificial Insemination in Beef Cows and Heifers

Download Synchronization of Follicular Wave Emergence, Luteal Regression, and Ovulation for Fixed-time Artificial Insemination in Beef Cows and Heifers PDF Online Free

Author : Kyle Jeffrey Stutts
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (862 download)

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Book Synopsis Synchronization of Follicular Wave Emergence, Luteal Regression, and Ovulation for Fixed-time Artificial Insemination in Beef Cows and Heifers by : Kyle Jeffrey Stutts

Download or read book Synchronization of Follicular Wave Emergence, Luteal Regression, and Ovulation for Fixed-time Artificial Insemination in Beef Cows and Heifers written by Kyle Jeffrey Stutts and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two experiments tested the efficacy of gonadotropin-releasing hormone (GnRH) or estradiol cypionate (ECP) administration in combination with controlled internal drug release (CIDR) inserts on pregnancy rate to fixed-time artificial insemination (FTAI) in beef heifers. In the first experiment, heifers in the two ECP groups received ECP in conjunction with the CIDR insert. The CIDR insert was removed and PGF was administered on either d 7 or 9. Heifers received ECP 24 h after CIDR removal and were inseminated 30 h after ECP. Heifers in the two GnRH groups received GnRH in conjunction with the CIDR insert. Heifers received PGF on either d 6 or 7, and the CIDR insert was removed on d 7. Heifers were inseminated and received GnRH 48 h after CIDR removal. Pregnancy rates to FTAI were higher for heifers treated with GnRH. Pregnancy rate to FTAI was highest for heifers in the GnRH group that received PGF on d 6 and was lowest for the group that received ECP in combination with a 7-d CIDR insert. In the second experiment, heifers received GnRH in conjunction with the CIDR insert. CIDR inserts were removed and PGF was administered on d 7. Heifers were inseminated 60 h later, with one group receiving GnRH at insemination. Pregnancy rate to FTAI was higher for heifers that received GnRHat insemination. The final experiment tested the efficacy of estradiol 17 _(E17) or GnRH in combination with a CIDR insert on pregnancy rate to FTAI in Brahman cows. Either E17 or GnRH was administered in conjunction with the CIDR insert. CIDR inserts were removed on d 7. Cows in the GnRH group received PGF on d 6 and GnRH at insemination which occurred 48 h after CIDR removal. Cows in the E17 group received PGF on d 7, E17 24 h later, and were inseminated 30h after E17 administration. Pregnancy rate to FTAI was higher for cows treated with E17. These data indicate acceptable pregnancy rates were obtained when the CIDR insert was combined with either GnRH in beef heifers or with E17 in Brahman cows.

Follicular Waves and Their Impact on the Dominant Follicle, Uterus, and Subsequent Pregnancy Rates in Beef Cattle

Author : Ashleigh Marie Muth-Spurlock
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (96 download)

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Book Synopsis Follicular Waves and Their Impact on the Dominant Follicle, Uterus, and Subsequent Pregnancy Rates in Beef Cattle by : Ashleigh Marie Muth-Spurlock

Download or read book Follicular Waves and Their Impact on the Dominant Follicle, Uterus, and Subsequent Pregnancy Rates in Beef Cattle written by Ashleigh Marie Muth-Spurlock and published by . This book was released on 2016 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ovarian steroids assist in the development of the follicle and its enclosed oocyte as well as prepare the maternal environment for pregnancy. The objective of experiment 1 was to elucidate the differences between dominant follicles of each follicular wave in terms of intra-follicular concentration of steroids after 4 d of dominance. Differences in blood perfusion between the dominant follicle of the first and second non-ovulatory wave were also examined. Follicular waves were monitored daily via ultrasonography from emergence to aspiration of the dominant follicle. It was determined that although the dominant follicles aspirated from ovulatory waves possessed a greater concentration of estradiol and a greater ratio of estradiol to progesterone, there was no difference in concentrations of steroid hormones or the ratio of estradiol to progesterone between dominant follicles collected from non-ovulatory waves and ovulatory waves. In a subset of cows, blood perfusion tended to be greater in dominant follicles that developed during the second non-ovulatory wave. The objective of experiment 2 was to determine whether or not the follicular wave had an effect on diameter of the ovulatory follicle, thickness of the endometrium, or subsequent pregnancy rates. Estrus was synchronized in females in such a way that females would ovulate the dominant follicle of the first or second follicular wave at timed artificial insemination. Diameter of the ovulatory follicle and endometrial thickness were not different between treatments; however, increased pregnancy rates were observed in heifers that ovulated the dominant follicle of the second follicular wave. There was no effect of follicular wave on pregnancy rates in cows. In conclusion, the role of follicular wave on the dominant follicle, maternal environment, and subsequent pregnancy rates is not fully understood. Additional experiments need to be conducted to further elucidate the differences in developmental potential of the oocyte and maternal environment when the dominant follicle of the first and second wave are destined to become the ovulatory follicle at timed insemination.

Synchronization of Follicular Wave Dynamics and Ovulation for Fixed-time Artificial Insemination in Cattle

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (654 download)

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Book Synopsis Synchronization of Follicular Wave Dynamics and Ovulation for Fixed-time Artificial Insemination in Cattle by :

Download or read book Synchronization of Follicular Wave Dynamics and Ovulation for Fixed-time Artificial Insemination in Cattle written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective was to develop new synchronization protocols that facilitate fixed-time artificial insemination (AI). A series of experiments were designed to evaluate the effects of estradiol and progesterone on gonadotrophin release, follicular wave emergence and ovulation in beef cattle. In ovariectomized cows, a new CIDR-B device increased plasma progesterone to near-luteal concentrations, but for only 2 to 3 days. Injection of 100 mg progesterone increased plasma progesterone approximately 2 ng/mL. Progesterone suppressed plasma LH concentrations but did not affect plasma FSH concentrations. Estradiol, with or without progesterone, resulted in FSH suppression with resurgence (and follicular wave emergence) at an interval that varied according to the estradiol formulation. Estradiol administration following CIDR-B removal resulted in LH release (and ovulation in intact animals). Both estradiol-17Î2 and estradiol benzoate (EB) synchronized ovarian follicular wave emergence in CIDR-Bï¿ư-treated animals and the interval from CIDR-B removal to ovulation (72 to 120 h) was shorter and more synchronous in estradiol-treated animals than in controls. In cattle given a CIDR-B device and estradiol plus progesterone, estradiol treatment following CIDR-B removal 7 days later resulted in acceptable conception rates to fixed-time AI. Estradiol or GnRH at the beginning and end of a 7-day MGA-based synchronization regimen resulted in acceptable pregnancy rates to fixed-time AI. In a single experiment, EB, GnRH or pLH in CIDR-B- or MGA-treated beef heifers effectively synchronized ovulation for fixed-time AI. Pregnancy rates were, on average, 58.0% (range 52.5 to 65.0%). A 6- or 7-d interval from GnRH to PGF in a Cosynch regimen resulted in similar pregnancy rates in cows. The addition of a progestin to a Cosynch or Ovsynch regimen improved pregnancy rates in heifers but not in cows. Synchronization of follicular wave emergence and ovulation in a two-dose PGF-based protocol.

Linear Mixed Models in Practice

Author : Geert Verbeke
Publisher : Springer Science & Business Media
ISBN 13 : 146122294X
Total Pages : 319 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Linear Mixed Models in Practice by : Geert Verbeke

Download or read book Linear Mixed Models in Practice written by Geert Verbeke and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive treatment of linear mixed models, focusing on examples from designed experiments and longitudinal studies. Aimed at applied statisticians and biomedical researchers in industry, public health organisations, contract research organisations, and academia, this book is explanatory rather than mathematical rigorous. Although most analyses were done with the MIXED procedure of the SAS software package, and many of its features are clearly elucidated, considerable effort was put into presenting the data analyses in a software-independent fashion.

Current Therapy in Large Animal Theriogenology - E-Book

Author : Robert S. Youngquist
Publisher : Elsevier Health Sciences
ISBN 13 : 1437713408
Total Pages : 1088 pages
Book Rating : 4.4/5 (377 download)

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Book Synopsis Current Therapy in Large Animal Theriogenology - E-Book by : Robert S. Youngquist

Download or read book Current Therapy in Large Animal Theriogenology - E-Book written by Robert S. Youngquist and published by Elsevier Health Sciences. This book was released on 2006-11-23 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Clinical Gynecology

Author : Eric J. Bieber
Publisher : Cambridge University Press
ISBN 13 : 1107040396
Total Pages : 1127 pages
Book Rating : 4.1/5 (7 download)

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Book Synopsis Clinical Gynecology by : Eric J. Bieber

Download or read book Clinical Gynecology written by Eric J. Bieber and published by Cambridge University Press. This book was released on 2015-04-23 with total page 1127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written with the busy practice in mind, this book delivers clinically focused, evidence-based gynecology guidance in a quick-reference format. It explores etiology, screening, tests, diagnosis, and treatment for a full range of gynecologic health issues. The coverage includes the full range of gynecologic malignancies, reproductive endocrinology and infertility, infectious diseases, urogynecologic problems, gynecologic concerns in children and adolescents, and surgical interventions including minimally invasive surgical procedures. Information is easy to find and absorb owing to the extensive use of full-color diagrams, algorithms, and illustrations. The new edition has been expanded to include aspects of gynecology important in international and resource-poor settings.

Part 1 MRCOG Revision Notes and Sample SBAs

Author : Neelanjana Mukhopadhaya
Publisher : Cambridge University Press
ISBN 13 : 1108659896
Total Pages : pages
Book Rating : 4.1/5 (86 download)

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Book Synopsis Part 1 MRCOG Revision Notes and Sample SBAs by : Neelanjana Mukhopadhaya

Download or read book Part 1 MRCOG Revision Notes and Sample SBAs written by Neelanjana Mukhopadhaya and published by Cambridge University Press. This book was released on 2020-12-10 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise yet comprehensive guide is focused on the curriculum and current exam style of the MRCOG Part 1 examination. It integrates clinical knowledge with basic science, providing readers with a deeper understanding of pathophysiology of medical disorders in obstetrics and gynaecology. The lead editor is a member of the Part 1 Examination Committee and her insights are skilfully woven into the book's revision notes, sample Single Best Answer (SBA) question and answer explanations, and tips on exam technique. The book encourages a structured thought process to develop, making it easier for clinicians to make differential diagnoses and conduct relevant investigations and treatment plans. The focus on basic sciences also endows readers with the ability to develop research ideas and evaluate findings. Featuring easy-to-read text, highlighted key points, illustrations, and plenty of practice papers, this succinct guide is essential preparation reading for trainee obstetricians and gynaecologists taking the challenging Part 1 MRCOG exam.

The Buffalo (Bubalus bubalis) - Production and Research

Author : Giorgio A. Presicce
Publisher : Bentham Science Publishers
ISBN 13 : 1681084171
Total Pages : 501 pages
Book Rating : 4.6/5 (81 download)

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Book Synopsis The Buffalo (Bubalus bubalis) - Production and Research by : Giorgio A. Presicce

Download or read book The Buffalo (Bubalus bubalis) - Production and Research written by Giorgio A. Presicce and published by Bentham Science Publishers. This book was released on 2017-03-31 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook aims at focusing on the husbandry of the common water buffalo, (Bubalis bubalis). The book covers a broad range of topics such as the buffalo’s genetic evolution, cytogenetics, subspecies, breed diversification, feeding and metabolic specificity, adaptable response to environmental stress factors, welfare, dairy requirements and production, reproduction and embryo technologies, cryopreservation, sperm cell sexing, somatic cell cloning and transgenesis. Chapters presented and reviewed in this book have been by contributed by renowned scientists that have devoted years of research to the understanding of this species, and highlight the most recent advances in basic and applied science to unveil the understanding of physiological facets intrinsic to this animal species. The depth of the selected topics makes this book especially suited for readers of all academic levels of study. Researchers, students and professionals will find this book a useful guide to breeding and farming the water buffalo.

A Textbook of Clinical Embryology

Author : Eliezer Girsh
Publisher : Cambridge University Press
ISBN 13 : 110889464X
Total Pages : 257 pages
Book Rating : 4.1/5 (88 download)

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Book Synopsis A Textbook of Clinical Embryology by : Eliezer Girsh

Download or read book A Textbook of Clinical Embryology written by Eliezer Girsh and published by Cambridge University Press. This book was released on 2021-05-06 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Personnel working in assisted reproductive technology often lack the opportunities for dedicated training in the specialized techniques and technologies required for the procedures. As such, success in the form of live birth rates can range from over 50% to less than 10% per treatment cycle. This comprehensive introductory textbook is an essential resource for trainee embryologists, medical students and nurses. The recent revolutions in biotechnology and molecular biology involved in delivering assisted reproductive services are thoroughly discussed. Basic knowledge such as the development and physiology of both male and female reproductive systems is covered, with practical aspects of IVF including gamete and embryo manipulation, cryopreservation and genetic testing explained in detail. A full description of the optimal structure and management of the IVF laboratory is given, helping ensure procedures are safe and effective. Extensive and highly detailed colour illustrations bring the content to life and aids readers in their understanding.

Pick Up and Oocyte Management

Author : Antonio Malvasi
Publisher : Springer Nature
ISBN 13 : 3030287416
Total Pages : 373 pages
Book Rating : 4.0/5 (32 download)

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Book Synopsis Pick Up and Oocyte Management by : Antonio Malvasi

Download or read book Pick Up and Oocyte Management written by Antonio Malvasi and published by Springer Nature. This book was released on 2019-11-28 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: This richly illustrated book focuses on one of the specific and crucial steps of the Medically Assisted Procreation techniques that is often overlooked: the oocyte pick-up. Enhanced by a large number of high-quality pictures, this atlas of oocyte retrieval comprehensively describes important aspects such as the setting of the ultrasonic equipment, the choice of needle, the layout of the devices in the room and the technique to be used, which, if not properly handled, can lead to erroneous behaviors. The original and detailed illustrations, mainly microscopic images and explanatory drawings, help readers to better understand how to manage all the phases of the ovarian pick-up and oocyte management. This practical atlas provides a valuable guide for all specialists who want to improve their skills and gain confidence with the MPA techniques.

The Fish Oocyte

Author : Patrick J. Babin
Publisher : Springer Science & Business Media
ISBN 13 : 1402062354
Total Pages : 513 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis The Fish Oocyte by : Patrick J. Babin

Download or read book The Fish Oocyte written by Patrick J. Babin and published by Springer Science & Business Media. This book was released on 2007-08-17 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview on egg production in fish, from the standpoint of the oocyte. It covers oocyte development, maturation, hydration and fertilization. The book places special emphasis on using state-of-the-art tools for discerning the ultra-structure of the follicle and genomic/proteomic tools to fully understand biological basis of fish reproduction.

Heat Stress and Animal Productivity

Author : Anjali Aggarwal
Publisher : Springer Science & Business Media
ISBN 13 : 813220879X
Total Pages : 200 pages
Book Rating : 4.1/5 (322 download)

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Book Synopsis Heat Stress and Animal Productivity by : Anjali Aggarwal

Download or read book Heat Stress and Animal Productivity written by Anjali Aggarwal and published by Springer Science & Business Media. This book was released on 2012-12-30 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dr. Anjali Aggarwal is working as a Senior Scientist at National Dairy Research Institute, Karnal (India). She holds a PhD degree in Animal Physiology and is involved in research and teaching at post-graduate level. Her area of research work is stress and environmental physiology. She has more than 50 publications, two technical bulletins, four manuals and many book chapters to her credit. She has successfully guided many post-graduate and PhD students. Her major research accomplishments are on microclimatic modification for alleviation of heat and cold stress, mist and fan cooling systems for cows and buffaloes, and use of wallowing tank in buffaloes. Her work involves the use of technology of supplementing micronutrients during dry period and early lactation to crossbred and indigenous cows for alleviating metabolic and oxidative stress and improved health and productivity. Studies are also done in her lab on partitioning of heat loss from skin and pulmonary system of cattle and buffaloes as a result of exercise or exposure to heat stress. Dr. R.C. Upadhyay is working as Head, Dairy Cattle Physiology Division at National Dairy Research Institute, Karnal (India). He graduated in Veterinary Sciences and obtained his PhD degree in Animal Physiology. His area of recent research is climate change, stress, and environmental physiology. His major research accomplishment is on climate change impact assessment of milk production and growth in livestock. His work also involves studying methane conversion and emission factors for Indian livestock and use of IPCC methodology of methane inventory of Indian livestock. Heat shock protein-70 expression studies in cattle and buffaloes are also done in his lab. Draught animal power evaluation, fatigue assessment, work-rest cycle and work limiting factors form the highlights of his work. Studies on partitioning of heat loss from skin and pulmonary system of cattle and buffaloes and electrocardiographic studies in cattle, buffalo, sheep and goat are also undertaken in his lab. He has more than 75 research papers, four books and several book chapters to his credit. Technologies developed and research done by him include methodology of methane measurement: open and closed circuit for cattle and buffaloes; inventory of methane emission from livestock using IPCC methodology; livestock stress index: thermal stress measurement based on physiological functions; and draught power evaluation system and large animal treadmill system. He received training in Radio-nuclides in medicine at Australian School of Nuclear Technology, Lucas heights, NSW, Australia in 1985 and Use of radioisotopes in cardiovascular investigations at CSIRO, Prospect, NSW, Australia, during 1985-86. He has guided several post-graduate and PhD students. He is recipient of Hari Om Ashram Award-1990 (ICAR) for outstanding research in animal sciences.

Follicular Growth and Ovulation Rate in Farm Animals

Author : J.F. Roche
Publisher : Springer Science & Business Media
ISBN 13 : 9780898388558
Total Pages : 282 pages
Book Rating : 4.3/5 (885 download)

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Book Synopsis Follicular Growth and Ovulation Rate in Farm Animals by : J.F. Roche

Download or read book Follicular Growth and Ovulation Rate in Farm Animals written by J.F. Roche and published by Springer Science & Business Media. This book was released on 1987-02-28 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypotheses regarding development of dominant follicles during a bovine estrous cycle; Inhibin and ovarian function; Development of preovulatory follicles in the cow from luteolysis until ovulation; Follicular development in heifers chronically treated with bromocryptine; ...

Textbook of Clinical Embryology

Author : Kevin Coward
Publisher : Cambridge University Press
ISBN 13 : 110727625X
Total Pages : 408 pages
Book Rating : 4.1/5 (72 download)

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Book Synopsis Textbook of Clinical Embryology by : Kevin Coward

Download or read book Textbook of Clinical Embryology written by Kevin Coward and published by Cambridge University Press. This book was released on 2013-10-31 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of Assisted Reproductive Technology is critically dependent upon the use of well optimized protocols, based upon sound scientific reasoning, empirical observations and evidence of clinical efficacy. Recently, the treatment of infertility has experienced a revolution, with the routine adoption of increasingly specialized molecular biological techniques and advanced methods for the manipulation of gametes and embryos. This textbook – inspired by the postgraduate degree program at the University of Oxford – guides students through the multidisciplinary syllabus essential to ART laboratory practice, from basic culture techniques and micromanipulation to laboratory management and quality assurance, and from endocrinology to molecular biology and research methods. Written for all levels of IVF practitioners, reproductive biologists and technologists involved in human reproductive science, it can be used as a reference manual for all IVF labs and as a textbook by undergraduates, advanced students, scientists and professionals involved in gamete, embryo or stem cell biology.

Using Science to Improve the BLM Wild Horse and Burro Program

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309264944
Total Pages : 399 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Using Science to Improve the BLM Wild Horse and Burro Program by : National Research Council

Download or read book Using Science to Improve the BLM Wild Horse and Burro Program written by National Research Council and published by National Academies Press. This book was released on 2013-10-04 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using Science to Improve the BLM Wild Horse and Burro Program: A Way Forward reviews the science that underpins the Bureau of Land Management's oversight of free-ranging horses and burros on federal public lands in the western United States, concluding that constructive changes could be implemented. The Wild Horse and Burro Program has not used scientifically rigorous methods to estimate the population sizes of horses and burros, to model the effects of management actions on the animals, or to assess the availability and use of forage on rangelands. Evidence suggests that horse populations are growing by 15 to 20 percent each year, a level that is unsustainable for maintaining healthy horse populations as well as healthy ecosystems. Promising fertility-control methods are available to help limit this population growth, however. In addition, science-based methods exist for improving population estimates, predicting the effects of management practices in order to maintain genetically diverse, healthy populations, and estimating the productivity of rangelands. Greater transparency in how science-based methods are used to inform management decisions may help increase public confidence in the Wild Horse and Burro Program.