Embryo
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From Egg To Embryo
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Author : J. M. W. Slack
language : en
Publisher: Cambridge University Press
Release Date : 1991-05-30
From Egg To Embryo written by J. M. W. Slack and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991-05-30 with Medical categories.
The last ten years have shown a dramatic revolution in our understanding of early animal development. This new edition of the successful first edition describes the result of this revolution and explains how the body plan of an embryo emerges from the newly fertilised egg. The book starts with a critical discussion of embryological concepts and explains in simple terms the mathematics of cell states, morphogen gradients and threshold responses. The experimental evidence on the mechanism of regional specification in Xenopus, molluscs, annelids, ascidians as well as Caenorhabditis, the mouse, the chick and Drosophila is then discussed. The whole chapter devoted to the exciting developments in Drosophila provides a clear guide to the subject, including a new table outlining the developmentally important genes. The emphasis throughout is on conceptual clarity and unity: bringing together the mathematical models, embryological experiments and molecular biology into a single, comprehensive coherent account.
The Embryo
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Author : Michael G. Chapman
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Embryo written by Michael G. Chapman and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.
A variety of new techniques that promise to revolutionize the clinical management of early pregnancy are fully detailed in this state-of-the-art book. Leading international researchers describe fast-moving topics such as embryo manipulation and the diagnosis of congenital abnormalities. The technology of assisted reproduction has made it possible to study living embryonic material for the first time, which has led to rapid advances in our understanding of the human embryo's early development. For example, study of the embryo in the test tube has pointed to early pregnancy loss as a possible cause of later infertility. Even more important, diagnostic tests using sophisticated techniques of molecular biology can be run on single cells before the embryo is replaced in the uterus. Another area of advance is the diagnosis of congenital abnormalities in the first and second trimesters of pregnancy. Great improvements have been made in the techniques of chorion villus biopsy and ultrasound imaging. A spectrum of simple biochemical tests performed on the mother's blood can greatly improve the detection of Down syndrome and other chromosome defects. Together with other developments in the fields of molecular biology and endocrinology, these new diagnostic techniques are the beginning of a new age in clinical human genetics and embryology.
From Egg To Embryo
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Author : J. M. W. Slack
language : en
Publisher: CUP Archive
Release Date : 1983
From Egg To Embryo written by J. M. W. Slack and has been published by CUP Archive this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Science categories.
This book is about the development of the animal embryo starting from the fertilised egg. The emphasis is on the problem of pattern formation: how cells in different regions of the embryo become programmed to form the various structures of the body in the correct relative positions.
In Vitro Fertilization And Embryo Transfer
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Author : Don P. Wolf
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
In Vitro Fertilization And Embryo Transfer written by Don P. Wolf and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Medical categories.
The use of human in vitro fertilization in the management of infertility is the outgrowth of years of laboratory observations on in vitro sperm-egg interaction. "The editors of this work have themselves contributed significantly to basic knowledge of the mammalian fertilization process. The observations of Don Wolf on sperm penetration, the block to polyspermy and, most recently, sperm hyperactivation in the monkey and human, Gregory Kopf's elucidation of the mechanisms of sperm activation during penetration and the reciprocal dialogue between sperm and egg, and Barry Bavister's definition of culture conditions and requirements necessary for in vitro oocyte maturation, fertilization and development in model mammalian systems including nonhuman primates have contributed greatly to our understanding of the mammalian fertilization process. Wolf, Kopf and Gerrity have enjoyed substantial interaction with clinicians in Departments of Obstetrics and Gynecology and have been directly involved with successful IVF programs. Both Wolf and Kopf have served as research scientists in the Division of Reproductive Biology at the University of Pennsylvania, which, for more than 22 years, has fostered co-mingling of clinically oriented and basic science faculty. It is through such interaction, which clearly exists at many institutions including the University of Wisconsin, that the process of technology transfer is best served. Without an exquisitely coordinated laboratory, there can be no consistent success in human in vitro fertilization. Quality control is pivotal, but close collaboration between the laboratory and the clinic is also essential as information is shared and correlated.
Donald School Embryo As A Person And As A Patient
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Author : Asim Kurjak
language : en
Publisher: Jaypee Brothers Medical Publishers
Release Date : 2019-09-30
Donald School Embryo As A Person And As A Patient written by Asim Kurjak and has been published by Jaypee Brothers Medical Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-30 with Medical categories.
The Mammalian Preimplantation Embryo
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Author : Barry D. Bavister
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Mammalian Preimplantation Embryo written by Barry D. Bavister and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
With a few notable exceptions, mammalian preimplantation embryos grown in vitro are likely to exhibit sub-optimal or retarded development. This may be manifested in different ways, depending on the species and on the stage(s) of embryonic development that are being examined. For example, bovine embryos often experience difficulty in cleaving under in vitro conditions, and usually cease development at about the 8-cell stage (Wright and Bondioli, 1981). The block to development is stage-dependent; embryos cultured for 24 hr from the I-cell stage are much more capable of developing into viable blastocysts after transfer to oviducts than embryos cultured for 24 hr from the 4-cell stage prior to transfer (Eyestone et oZ. , 1985). Similar problems with in vitro embryo development are encountered in other species. Pig embryos can be grown up to the 4-cell stage in vitro but usually no further (Davis and Day, 1978). In the golden hamster, in the rat and in many outbred strains of mice, development of zygotes in vitro is blocked at the 2-cell stage (Yanagimachi and Chang, 1964; Whittingham, 1975). Even with some inbred mouse strains, embryo development is reduced if very early cleavage stages are used as the starting point for in vitro culture (Spielmann et oZ. , 1980). A common finding is that embryos grown in vitro have reduced cell counts (Harlow and Quinn, 1982; Kane, 1985) and their viability is reduced (Bowman and McLaren, 1970; Papaioannou and Ebert, 1986) compared to equivalent developmental stages recovered from mated animals.
Icons Of Life
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Author : Lynn Morgan
language : en
Publisher: Univ of California Press
Release Date : 2009-09-09
Icons Of Life written by Lynn Morgan and has been published by Univ of California Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-09-09 with Social Science categories.
Icons of Life tells the engrossing and provocative story of an early twentieth-century undertaking, the Carnegie Institution of Washington's project to collect thousands of embryos for scientific study. Lynn M. Morgan blends social analysis, sleuthing, and humor to trace the history of specimen collecting. In the process, she illuminates how a hundred-year-old scientific endeavor continues to be felt in today's fraught arena of maternal and fetal politics. Until the embryo collecting project-which she follows from the Johns Hopkins anatomy department, through Baltimore foundling homes, and all the way to China-most people had no idea what human embryos looked like. But by the 1950s, modern citizens saw in embryos an image of "ourselves unborn," and embryology had developed a biologically based story about how we came to be. Morgan explains how dead specimens paradoxically became icons of life, how embryos were generated as social artifacts separate from pregnant women, and how a fetus thwarted Gertrude Stein's medical career. By resurrecting a nearly forgotten scientific project, Morgan sheds light on the roots of a modern origin story and raises the still controversial issue of how we decide what embryos mean.
Embryo Culture
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Author : Beth Kohl
language : en
Publisher: Sarah Crichton Books
Release Date : 2007-08-07
Embryo Culture written by Beth Kohl and has been published by Sarah Crichton Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-08-07 with Biography & Autobiography categories.
"Injections + Appointments + Egg Retrieval + Embryo Transfer = Resources (Energy x Time x Emotion)" That's the equation that was projected onto the screen when Beth Kohl and her husband first showed up at the in vitro fertilization (IVF) clinic. "Good evening," the program's psychologist told the gathered infertile couples. "Before you begin your treatment, you should know that this program is emotionally and psychologically stressful." And how. In this marvelously unconventional account of her struggles to bear children, Kohl leads the reader on an oh-so-up-close tour of fertilization in America, and the ways in which science and miracle, technology and faith, converge to create life in the twenty-first century. Along the way, Kohl wrestles with a new world of medical ethics: Should she "selectively reduce" the number of embryos successfully implanted in the womb in order to prevent a potentially complicated pregnancy? How much genetic testing of fertilized eggs is too much? What is she supposed to do with the seven embryos left over from the IVF process? When Andrew Solomon wrote The Noonday Demon, he opened the world of depression to readers as no writer had done before. And when Stephen L. Carter wrote Reflections of an Affirmative Action Baby, many readers were forced to completely rethink race and prejudice. Kohl's spirited and rich exploration of "embryo culture" will completely revise how we see modern motherhood.
Hew Support Of Research Involving Human In Vitro Fertilization And Embryo Transfer
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Author : United States. Department of Health, Education, and Welfare. Ethics Advisory Board
language : en
Publisher:
Release Date : 1979
Hew Support Of Research Involving Human In Vitro Fertilization And Embryo Transfer written by United States. Department of Health, Education, and Welfare. Ethics Advisory Board and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Embryology, Human categories.
Human In Vitro Fertilization And Embryo Transfer
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Author : Don P. Wolf
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Human In Vitro Fertilization And Embryo Transfer written by Don P. Wolf and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Psychology categories.
The births of more than 100 apparently normal infants at term following pregnancies initiated by in vitro fertilization and embryo transfer testifies to the successful clinical application of insights obtained from studies in reproductive biology over the last 20 years. In women, these studies have included: 1) characterization of the changes in blood hormone profiles throughout ovulatory menstrual cycles; 2) documentation of the hormonal composition of antral fluid in developing and degenerating preovulatory follicles; 3) correlation of these observations with the state of oocyte maturation and the fertilizability of the oocyte; 4) application of pharmacologic agents for perturbing the normal hormone profiles to regulate the number of preovulatory follicles developing and the time of ovulation; and 5) development of non-invasi ve methods for monitoring follicular development. Optimizing methods for maturing and fertilizing eggs, for moni toring normal development in vi tro, and for transferring and achieving implantation of embryos are continuing concerns of physicians and scientists responsible for extant programs. In addition, all serious students of reproductive biology should critically examine every facet of the processes which must concatenate to assure birth of normal infants following pregnancies achieved by these methods. However, the literature which contains the informational substrate is dispersed widely in a plethora of journals not always readily accessible. Bringing the essentials together facilitates both rapid retrieval of data and access to relevant literature.