The Leydig Cell

This book provides a comprehensive study of the Leydig cell, a fascinating and important cell type. It presents all of the developments in our understanding of Leydig cell biology and explores a wide variety of current and potential clinical applications. All aspects of Leydig cell biology, development, regulation, and physiology are explored in thirty-one expertly written chapters. This in-depth volume is an invaluable resource.

The testis is composed of seminiferous tubules and interstitial tissue. The most important component of the interstitial tissue are the testosterone-producing Leydig cells. The seminiferous tubules contain the successive generations of germ cells, which can only exist in the presence of Sertoli cells. Sertoli cells mediate the effect of testosterone, which is indispensable for the maintenance of spermatogenesis. Consequently, the function of the Sertoli cells depends large lyon the function of the Leydig cells, and a local control mechanism between the two cell systems has been assumed. Sertoli cells are supposed to interfere with the regulation of Leydig cell hormone production (Aoki and Fawcett 1978; Sharpe et al. 1981). Few cell types of the testis have received as much attention in recent years as have the Sertoli cells. While comprehensive data had accumulated concerning the differentiation of germ cells, there was formerly little information available on the influence of Sertoli cells on this process. Only through recently developed methods and experimental approaches could their central role in spermatogene sis be verified. Sertoli cells are the only somatic cells in the seminiferous tubules. Their origin is still disputed (for references see Ritzen et al. 1981). They supposedly stem either from the coelomic epithelium or from mesenchymal cells of the genital ridges. According to Wartenberg (1978) they are derived from a gonadal blas tema containing cells from both the coelomic epithelium and the mesonephros.

The new edition of this canonical text on male reproductive medicine will cement the book's market-leading position. Practitioners across many specialties - including urologists, gynecologists, reproductive endocrinologists, medical endocrinologists and many in internal medicine and family practice – will see men with suboptimal fertility and reproductive problems. The book provides an excellent source of timely, well-considered information for those training in this young and rapidly evolving field. While several recent books provide targeted 'cookbooks' for those in a male reproductive laboratory, or quick reference for practising generalists, the modern, comprehensive reference providing both a background for male reproductive medicine as well as clinical practice information based on that foundation has been lacking until now. The book has been extensively revised with a particular focus on modern molecular medicine. Appropriate therapeutic interventions are highlighted throughout.

Bovine Reproduction is a comprehensive, current reference providing information on all aspects of reproduction in the bull and cow. Offering fundamental knowledge on evaluating and restoring fertility in the bovine patient, the book also places information in the context of herd health where appropriate for a truly global view of bovine theriogenology. Printed in full color throughout, the book includes 83 chapters and more than 550 images, making it the most exhaustive reference available on this topic. Each section covers anatomy and physiology, breeding management, and reproductive surgery, as well as obstetrics and pregnancy wastage in the cow. Bovine Reproduction is a welcome resource for bovine practitioners, theriogenologists, and animal scientists, as well as veterinary students and residents with an interest in the cow.

Diagnose common equine tumors accurately and find clinical information quickly! Clinical Equine Oncology describes the cellular basis of cancer and its etiopathogenesis, along with the principles of diagnosis, treatment, and management of cancer cases. This comprehensive resource offers more than just facts and diagrams — hundreds of detailed photographs make it easier to recognize and evaluate more than 50 types of tumors. It’s useful to anyone working in the equine field, whether you’re a veterinary surgeon, a practicing vet, equine dentist, or veterinary student. Written by a recognized expert on equine medicine, Derek Knottenbelt, this is the only book on the market that is completely dedicated to coverage of cancer in horses! More than 50 different types of tumor are covered, including tumors that occur in each of the 10 body systems. Over 800 excellent-quality photographs show the appearance of pathologies and cancerous conditions both before and after treatment. More than 80 full-color diagrams summarize key information. Detailed Pathology section describes common neoplasms in horses, cites research literature, and describes what is generally known about each condition. Authoritative, inclusive, and unique coverage is likely to remain the standard reference for years to come. Expert authors are recognized as the top experts in the field of equine oncology. Practical, colorful design includes icon-based references for quick appraisal of prevalence and prognosis.

This book highlights the similarities and differences in the pathology of the genital and urinary tracts in males and females.