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Fertilization provides in-depth reviews of individual research topics, while emphasizing key concepts and the significance of findings within other fields. The author identifies essential questions to be answered by future research. Fertilization broadly covers the many molecular and cellular events of animal fertilization and includes a section on unique problems and potential applications of fertilization research.Key Features* Provides in-depth reviews of individual research topics* Emphasizes key concepts and significance of findings to other fields* Broad

Fertilization (Biology) --- Amphimixis --- Biology --- Cells --- Embryology --- Physiology --- Reproduction

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Cette Ligne directrice pour l’essai sur la reproduction est conçue pour fournir des informations générales concernant les effets d’une substance d’essai (liquide, solide, gaz ou vapeur), sur la performance reproductrice des mâles et des femelles. La substance d’essai est administrée oralement par dose graduée à plusieurs groupes de mâles et de femelles. Les mâles doivent être dosés durant la croissance et au moins pendant un cycle spermatogène complet ; les femelles de la génération parentale doivent être dosées pendant au moins deux cycles oestraux. Les animaux sont alors accouplés. La substance d’essai est administrée aux deux sexes pendant la période d’accouplement et par la suite seulement aux femelles pendant la période de gestation et d’allaitement. Cette Ligne directrice utilise principalement le rat ou la souris. Chaque groupe d'essai et de contrôle devrait contenir un nombre suffisant d'animaux pour garantir environ 20 femelles gravides à terme (ou presque à terme). Trois groupes d’essai au moins doivent être employés. Il est recommandé que la substance d’essai soit administrée dans la nourriture ou dans la boisson. Un essai limite peut être effectué si aucun effet n’est attendu à une dose de 1000 mg/kg poids corporel/j. Les résultats de l’étude comportent des mesures ( poids, consommation de nourriture) et des observations quotidiennes détaillées, tous les jours de préférence au même moment, de même qu’une autopsie générale et de l’histopathologie. Les résultats d'une étude de toxicité de reproduction sont évalués en termes d'effets observés, autopsie et résultats microscopiques. Un essai correctement effectué de reproduction fournit une évaluation satisfaisante d'un niveau de sans effet et une compréhension des effets nuisibles sur la reproduction, la parturition, la lactation et la croissance postnatale.

Reproduction --- Amphimixis --- Generation --- Pangenesis --- Procreation --- Biology --- Life (Biology) --- Physiology --- Sex (Biology) --- Embryology --- Generative organs --- Theriogenology --- Reproduction.

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The 3rd edition, the first new one in ten years, includes coverage of molecular levels of detail arising from the last decade's explosion of information at this level of organismic organization. There are 5 new Associate Editors and about 2/3 of the chapters have new authors. Chapters prepared by return authors are extensively revised. Several new chapters have been added on the topic of pregnancy, reflecting the vigorous investigation of this topic during the last decade.The information covered includes both human and experimental animals; basic principles are sought, and information

Reproduction. --- Amphimixis --- Generation --- Pangenesis --- Procreation --- Biology --- Life (Biology) --- Physiology --- Sex (Biology) --- Embryology --- Generative organs --- Theriogenology

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Reproduction --- Philosophy --- Aristotle. --- Aristotle --- -Amphimixis --- Generation --- Pangenesis --- Procreation --- Biology --- Life (Biology) --- Physiology --- Sex (Biology) --- Embryology --- Generative organs --- Theriogenology --- Aristoteles. --- Reproduction. --- -Philosophy --- Aristoteles --- Aristote --- Aristotile --- Amphimixis --- Aristotle - On the generation of animals

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Reproduction is essential to the continuation and evolution of life on this planet and is therefore a centrally important process in the conservation of wildlife. However, reproductive mechanisms are well understood in only a handful of vertebrate species, mostly domestic livestock and laboratory animals. This means that attempts to develop and implement management policies for wildlife conservation, and especially for endangered species that, by definition, are difficult to study, are often based on poor data or no data at all. In Reproductive Science and Integrated Conservation leading authorities provide glimpses of reproductive diversity in fishes, amphibia, reptiles, birds and mammals. Conservation plans are founded on the assumption that reproduction will be successful, but what if it fails? This book reviews the many factors that influence reproduction, including genetics, behaviour and nutrition, and experts assess the potential conservation relevance of the recent rapid advances in reproductive technology and medicine.

Conservation biology. --- Reproduction. --- Amphimixis --- Generation --- Pangenesis --- Procreation --- Biology --- Life (Biology) --- Physiology --- Sex (Biology) --- Embryology --- Generative organs --- Theriogenology --- Ecology --- Nature conservation