Spermatogenesis involves the coordination of a number of signaling pathways, which culminate into production of sperm. Its failure results in male factor infertility, which can be due to hormonal, environmental, genetic or other unknown factors. This book includes chapters on most of the signaling pathways known to contribute to spermatogenesis. Latest research in germ cell signaling like the role of small RNAs in spermatogenesis is also discussed. This book aims to serve as a reference for both clinicians and researchers, explaining possible causes of infertility and exploring various treatment methods for management through the basic understanding of the role of molecular signaling. Key Features Discusses the signaling pathways that contribute to successful spermatogenesis Covers comprehensive information about Spermatogenesis at one place Explores the vital aspects of male fertility and infertility Explains the epigenetic regulation of germ cell development and fertility Highlights the translational opportunities in molecular signaling in testis

The Human Embryo in vitro explores the ways in which UK law engages with embryonic processes under the Human Fertilisation and Embryology Act 1990 (as amended), the intellectual basis of which has not been reconsidered for almost thirty years. McMillan argues that in regulating 'the embryo' - that is, a processual liminal entity in itself - the law is regulating for uncertainty. This book offers a fuller understanding of how complex biological processes of development and growth can be better aligned with a legal framework that purports to pay respect to the embryo while also allowing its destruction. To do so it employs an anthropological concept, liminality, which is itself concerned with revealing the dynamics of process. The implications of this for contemporary regulation of artificial reproduction are fully explored, and recommendations are offered for international regimes on how they can better align biological reality with social policy and law.

A collection of objective essays reviewing the principal arguments for and against stem cell research. Among the issues considered are whether stem cell research treats embryos as "commodities," violates the rights of human embryos, or alienates women from their reproductive labor, and whether human embryos are entitled to full membership in the moral community.

First published in 1959 as the second edition of a 1934 original, this book describes the Western history of embryology from prehistoric concepts of foetal growth through Graeco-Roman antiquity to the close of the eighteenth century. The text is illustrated with plates and diagrams showing the development of scientific understanding over time, first through artistic representations of gestation and later through scientific drawings and sketches. This book will be of value to anyone with an interest in the history of medicine.

Too tiny to see with the naked eye, the human embryo was just a hypothesis until the microscope made observation of embryonic development possible. This changed forever our view of the minuscule cluster of cells that looms large in questions about the meaning of life. Embryos under the Microscope examines how our scientific understanding of the embryo has evolved from the earliest speculations of natural philosophers to today's biological engineering, with its many prospects for life-enhancing therapies. Jane Maienschein shows that research on embryos has always revealed possibilities that appear promising to some but deeply frightening to others, and she makes a persuasive case that public understanding must be informed by up-to-date scientific findings. Direct observation of embryos greatly expanded knowledge but also led to disagreements over what investigators were seeing. Biologists confirmed that embryos are living organisms undergoing rapid change and are not in any sense functioning persons. They do not feel pain or have any capacity to think until very late stages of fetal development. New information about DNA led to discoveries about embryonic regulation of genetic inheritance, as well as evolutionary relationships among species. Scientists have learned how to manipulate embryos in the lab, taking them apart, reconstructing them, and even synthesizing--practically from scratch--cells, body parts, and maybe someday entire embryos. Showing how we have learned what we now know about the biology of embryos, Maienschein changes our view of what it means to be alive.

Founded in 1914, the Department of Embryology of the Carnegie Institution of Washington has made an unparalleled contribution to the biological understanding of embryos and their development. Originally much of the research was carried out through experimental embryology, but by the second half of the twentieth century, tissue and cell cultures were providing histological information about development, and biochemistry and molecular genetics have taken center stage. This final volume in a series of five histories of the Carnegie Institution of Washington provides a history of embryology and reproductive biology spanning a hundred years. It provides important insights into the evolution of both scientific ideas and the public perception of embryo research, concluding with a reflection on current debates.

Carl Edward Sagan's (1934-1996) one of the famous quotation was "Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people." From past to date, well-known molecules, enzymes, proteins, lipids and carbohydrates are studied in the pathogenesis of several diseases both as a diagnostic/prognostic biomarker and therapeutic agent. The underlying mechanism of unexplained diseases and failure of therapies are frequently studied with well-known biomarkers, but remain unclear in many cases. As Dr. Sagan said other keys are still waiting to be known in some forgotten corner of a body universe, we find strength to propose that one of them can be the growth factor with cytokine activity named "Midkine" This book summarizes the extensive up-to-date literature overeview with the lastest work of experts about midkine in a detailed format that conveys its role as both a pathologic factor and therapeutic agent.

Embryology at a Glance is a highly illustrated and innovative introduction to key embryological concepts, with concise, memorable descriptions of major embryological developments. This new edition covers the basic principles of human development, from mitosis and meiosis, before exploring the primary formation of each body system, including the development of the musculoskeletal, circulatory, digestive, reproductive, and nervous systems during the foetal and neonatal periods. Key features include: New chapters on cell signalling genes, stem cells, and antenatal screening for common congenital and genetic defects Full colour photographs and illustrations Links to clinical practice highlighted throughout Timelines of each developmental stage MCQs and EMQs for revision and review A companion website at www.ataglanceseries.com/embryology featuring 15 brand new animations, and podcasts to help clearly explain the processes that occur during development. An additional instructor resource contains an image bank of all the figures from the book to aid teaching this fascinating area Embryology at a Glance provides the perfect alternative to the overwhelming detail seen in conventional embryology texts. It provides just the right level of detail on embryology and congenital abnormalities for all medical students and health professionals to develop a thorough understanding of human development and its implications for clinical practice.

Public attention on embryo research has never been greater. Modern reproductive medicine technology and the use of embryos to generate stem cells ensure that this will continue to be a topic of debate and research across many disciplines. This multidisciplinary book explores the concept of a 'healthy' embryo, its implications on the health of children and adults, and how perceptions of what constitutes child and adult health influence the concept of embryo 'health'. The concept of human embryo health is considered from preconception to pre-implantation genetic diagnosis to recent foetal surgical approaches. Burgeoning capacities in both genetic and reproductive science and their clinical implications have catalysed the necessity to explore the concept of a 'healthy' embryo. The authors are from five countries and 13 disciplines in the social sciences, humanities, biological sciences and medicine, ensuring that the book has a broad coverage and approach.

Scientists and philosophers have long struggled to answer the questions of when human life begins and when human life has inherent value. The phenomenon of identical (monozygotic) twinning presents a significant challenge to the view that human life and human personhood begin at conception. The fact that a single embryo can split to generate two (or more) genetically identical embryos seems to defy the notion that prior to splitting an embryo can be a single human individual. In Untangling Twinning, Maureen Condic looks at the questions raised by human twinning based on a unique synthesis of molecular developmental biology and Aristotelian philosophy. She begins with a brief historical analysis of the current scientific perspective on the embryo and proceeds to address the major philosophic and scientific concerns regarding human twinning and embryo fusion: Is the embryo one human or two (or even more)? Does the original embryo die, and if not, which of the twins is the original? Who are the parents of the twins? What do twins, chimeras, cloning, and asexual reproduction in humans mean? And what does the science of human embryology say about human ensoulment, human individuality, and human value? Condic's original approach makes a unique contribution to the discussion of human value and human individuality, and offers a clear, evidence-based resolution to questions raised by human twinning. The book is written for students and scholars of bioethics, scientists, theologians, and attorneys who are involved in questions surrounding the human embryo.

Concise, clearly written, and vibrantly illustrated, Langman's Medical Embryology, 15th Edition, makes complex embryology concepts approachable to help you build the clinical understanding essential to your success in medical practice, nursing, or other health professions. Hundreds of full-color illustrations clarify the stages of embryonic development with rich detail, and engaging learning features, clinical examples, and online review questions ready you for the challenges ahead on your exams and in clinical practice. NEW! Medical Embryology Animations, now included with the purchase of the print book, allow users to visualize the stages of human development and master the corresponding anatomical relationships. UPDATED! Clinical Correlates boxes reinforce clinically relevant content through realistic case-based scenarios you're likely to encounter in practice. UPDATED! More than 400 full-color illustrations, micrographs, and clinical images clarify key aspects of embryonic development in vivid detail. UPDATED! Clinical vignette and USMLE-style multiple-choice questions, available via digital access, with answers provide valuable self-assessment and strengthen your test-taking confidence. Problems to Solve boost your critical thinking capabilities. End-of-Chapter Summaries detail key stages of development, terms, and clinical conditions for each chapter at a glance.

Life Before Birth provides a coherent framework for addressing bioethical issues in which the moral status of embryos and fetuses is relevant. It is based on the "interest view" which ascribes moral standing to beings with interests, and connects the possession of interests with the capacity for conscious awareness or sentience. The theoretical framework is applied to ethical and legal topics, including abortion, prenatal torts, wrongful life, the crime of feticide, substance abuse by pregnant women, compulsory cesareans, assisted reproduction, and stem cell research. Along the way, difficult philosophical problems, such as identity and the non-identity problem are thoroughly explored. The book will be of interest not only to philosophers, but also physicians, lawyers, policy makers, and anyone perplexed by the many difficulties surrounding the unborn.
"Bonnie Steinbock's excellent book is . . . consistent, thoroughgoing, and intelligible." --Nature
"Steinbock's book is valuable for all interested in the ethical/legal issues surrounding abortion, prenatal injury and liability, maternal-fetal conflict, and fetal/embryo research. The author provides an excellent historical overview of these issues, but she also addresses the issues from the stance of a particular theory of moral status, namely, interest theory. This gives coherence to her discussion as well as allowing testing of the viability of interest theory."
--Choice
"A focused, lucid, analytically fine-grained discussion of a wide variety of problems. . . extremely useful as a survey of the current state of the debate." --Religious Studies Review
"Merits serious consideration by physicians. Steinbock's interests-based approach treats all questions as open -- another and most welcome breath of fresh air." -New England Journal of Medicine
"An extremely valuable contribution to the literature. The author carefully identifies the many bioethical issues to which the status of embryos and fetuses is relevant....She thoroughly reviews the extensive medical, bioethical, and legal literature on all of these issues, offering well-developed critiques of many standard positions. She articulates and thoughtfully defends interesting positions on all of theses topics. Anyone with an interest in these issues will learn a great deal from her knowledgeable and judicious treatment of them." -- The Journal of Clinical Ethics

This thoroughly revised second edition is an up-to-date overview of the current knowledge of Notch and Notch signaling in embryology and cancer. It discusses this topic from Notch's role in the development of the embryo to the Notch signaling pathway's role in the development of a number of cancers, including breast cancer, malignant melanoma, Non-melanoma skin cancer, intestinal cancer and others. In the years since the previous edition, there have been numerous developments and insights within this rapidly moving field, making this new edition urgently needed. This volume also features discussions of current insights on Notch's role in senescence, the regulation of Notch signaling by microRNAs, Notch's role in the microbiome, diet and its influence on Notch signaling and more. Taken as a whole, with its companion books - Molecular Biology of Notch Signaling and Notch Signaling in Cancer - this is a definitive discussion of the topic, presented by internationally-recognized contributors. Presented in a coherent and accessible structure, this revised and updated second edition is an essential and up-to-date guide for oncologists, embryologists, researchers and advanced students.

The possibility that human beings may soon be cloned has generated enormous anxiety and fueled a vigorous debate about the ethics of contemporary science. Unfortunately, much of this debate about cloning has treated cloning as singular and revolutionary. The essays in Cloning and the Future of Human Embryo Research place debates about cloning in the context of reproductive technology and human embryo research. Although novel, cloning is really just the next step in a series of reproductive interventions that began with in vitro fertilization in 1978. Cloning, embryo research, and reproductive technology must therefore be discussed together in order to be understood. The authors of this volume bring these topics together by examining the status of preimplantation embryos, debates about cloning and embryo research, and the formulation of public policy. The book is distinctive in framing cloning as inextricably tied to embryo research and in offering both secular and religious perspectives on cloning and embryo research.

Investigations on anatomical specimens have demonstrated that the subchondral mineralization does indeed show regular distribution patterns from which conclusions about the mechanical situation within an individual joint may be drawn. Since radiographical densitometry and histological methods are only available for determining the adaptive reaction of the bone to the mechanical situation in a joint after death, the information obtained applies only to an end situation and tells us nothing about the development of the changes with time. Furthermore, investigations carried out on human specimens by radiographical densitometry mostly apply to samples of a particular age, since such specimens can be acquired only from departments of pathology, forensic medicine or anatomy.

This work attempts to sketch a coherent picture of the amniotic fluid com partment, its borders, and the interactions occurring between fetus and amniotic fluid, for it is this compartment which for 10 months provides the habitat in which the fetus and its functions develop. As a matter of course, our mor phological studies had to be limited to the situation prevailing at the full term of pregnancy. This portrayal purposely neglects the placenta, which is already the subject of an extraordinary profusion of literature. The other aspects of the embryonic sac have been overshadowed to date by the preeminent role 2 of the placenta, although they represent around 1200cm of contact surface in the maternal compartment. From our point of view, the fetal membranes not only act as a seal or simply a diffusion barrier, but actively participate in the exchange processes between compartments. The author also took pains to compile (albeit incompletely) the widely scattered findings reported in clinical journals in order to present them as a well-rounded summary of the mor phological picture and the functional happenings involved in fetal develop ment. The author's own studies of a specifically histomorphological nature provided the groundwork for this synopsis. A special branch of embryology, embryonal physiology, is treated only incidentally in today's embryology textbooks. This work offers several encounters with this field, which should help make it the focus of greater interest. 2 Definition of Terms Fig. 1.

1. 1 The Cytokeratins as a Member of the Intermediate Filament Protein Family Intermediate filaments together with microtubules and actin microfilaments make up the filamentous cytoskeleton found in the cytoplasm of vertebrate cells. Recently, intermediate filament proteins have also been described in invertebrates, but their chemistry is not yet known (for review see Biessmann and Walter 1989). These filaments (about 10 nm in diameter) used to be categorized into five classes - cytokeratin, vimentin, desmin, glial fibrillary acidic protein (GFAP), and neurofilaments (NFs). The expression of these proteins follows differentiation-dependent rules: cytokeratins occur in epi- thelial cells, NF proteins are expressed in neurons, GFAP in astrocytes and some nonglial cells, desmin in smooth muscle cells and in striated myocytes, and vimentin in mesenchymal cells (for review see Lazarides 1980; Osborn and Weber 1983). Recent investigations including deoxyribonucleic acid (DNA) and protein sequencing and peptide mapping have redefined the intermediate filaments into five types or subfamilies (type I, acidic cytokeratins; type II, basic cytokeratins; type III, vimentin, desmin, peripherin, and GFAP; type IV, the three NF proteins; and type V, the nuclear lamins (for review see Nagle 1988). A new type VI intermediate filament protein, nestin, has been described in the developing nervous system (Lendahl et al. 1990), and is initially co- expressed with vimentin in neuroepithelial stem cells (Steinert and Liem 1990). The cytokeratins are the most complex subgroup of intermediate filament proteins.

The German verbs verwerfen, nicht implantieren or abtAten have the same denotations when used in reference to dealing with artificially-inseminated embryos; however, the meanings of these words are respectively different. The book examines, against the background of the debate about the introduction of pre-implantation diagnostics in Germany, the role of linguistic naminga " so-called thematizationsa " in the public sphere. The study shows that these thematizations not only reflect linguistic controversy, but at the same time, precisely mirror the current societal debates.

The advent of ultrasound scans has made it possible to observe the fetus undisturbed in its natural surroundings. In this remarkable book, Dr Alessandra Piontelli describes in moving detail her observations of the behaviour of several children from very early stages in the womb, through birth, to infancy and childhood. By drawing on her experiences as a child psychotherapist and psychoanalyst as well as on her observational research, she is able to investigate issues relating to individuality, psychological birth and the influence of maternal emotions during pregnancy.
The first study of its kind, From Fetus to Child shows how observational and psychoanalytic data can offer different but complementary insights in attempting to answer fundamental questions about human development.

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In 1953, at the grand age of 92, Ferdinand Hochstetter submitted his famous collection of photographs of human embryos entitled: "Uber die Entwicklung der Formverhaltnisse des menschlichen Antlitzes." Together with others papers, this contribution was published in 1955, a year after Hochstetter's death. In unbroken combativeness, Hochstetter discussed his results with regard to those of earlier embryologists and to those of his own lifetime. Thus, in an obituary, Elze (1956) reported about one of Hochstetter's letters from the year of his death (1954): "nur einige blodsinnige Behauptungen, die Fischel in seiner Ent- wicklung des Menschen verzapft hat, mochte ich vielleicht noch annageln," which may be translated as: "I would just like to pin down a few silly assertions that Fischel made in his Entwicklung des Menschen." In the first two paragraphs of his paper Hochstetter stated (in German, here translated freely): When I decided to write a detailed paper about the development of the morphology of the human face, too [in addition to a paper about morphology of the extremities in human embryos], I was especially moved by the fact that in none of the German manuals and textbooks on embryology known to me is there to be found a presentation of the development of the human face which could be considered - eveJ;l to a limited extent - rich in details, true, sufficiently illustrated, easy to understand by students as well as by scien-

This textbook presents essential and accessible information about human embryology including practical information on human health issues and recent advances in human reproductive technology. Starting with biological basics of cell anatomy and fertilization, the author moves through the development of specific organs and systems, before addressing social issues associated with embryology. Each chapter includes specific objectives, general background, study questions, and questions to inspire critical thinking. Human Life Before Birth also contains two appendices and a full glossary of terms covered in the text. Clinicians and researchers in this field will find this volume indispensable. Key selling features: Explores all the developmental and embryological events that occur in human emryonic and fetal life Reviews basic cell biology, genetics, and reproduction focusing entirely on humans Summarizes the development of various anatomical systems Examines common birth defects and sexually transmitted diseases including emerging concerns such as Zika Documents assisted fertilization technologies and various cultural aspects of reproduction

Replacing and superseding all other works in this area, Dr. Lucinda L. Veeck's An Atlas of Human Gametes and Conceptuses is the only book now in print that shows the typical and atypical morphology of human oocytes, sperm, and preembryos collected and cultured during the course of in vitro fertilization treatment. Brilliantly illustrated with hundreds of original photographs in color as well as black and white, the book also details and fully illustrates specific new reproductive technologies and provides the reader with both a glossary and a concise history of in vitro fertilization. Includes bibliographic references and index.

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.

Human Embryos and Preimplantation Genetic Technologies: Ethical, Social, and Public Policy Aspects presents the first holistic analysis of PGD and PGS as it is practiced and regulated worldwide. In addition to scientific and technical aspects, the book provides perspectives on the ethical, legal, religious, policy and social implications of global assisted reproduction technologies, including in Africa, Asia, Europe, North and South America, and Australia. Chapters cover history, ethics, feminism, family dynamics, psychological and interpersonal factors, the current state of PGD and PGS in 20 different sovereign nations and religious communities, and provide an analysis of public policy concerns and future directions.