The Sperm Cell. Production, Maturation, Fertilization, Regeneration edited by Christopher De Jonge and Christopher Barratt. 359 pp., United Kingdom: Cambridge University Press; 2006. ISBN: 0‐521‐85397‐4. Cost: $95.00
Bibliographic record
Abstract
Grading Key ★★★★★=outstanding; ★★★★=excellent; ★★★=good; ★★=fair; ★=poor. Type of Book: Multi-authored, edited volume. Scope of Book: Comprehensive review of the biology of the sperm cell; the focus is on human sperm with relevant nonhuman mammalian sperm data included. In addition to the areas denoted in the title, chapters on the genetics, epigenetic modifications, and genetic aberrations leading to male infertility are presented. Comments: The book contains 12 chapters, spanning spermatogenesis to DAZ genes and development from embryonic stem cells. There are 25 contributors from Australia, Canada, Germany, Netherlands, South Africa, United Kingdom, and United States. The first chapter provides a detailed account of spermatogenesis with emphasis on structure and biogenesis of the many components of the cell. From this auspicious beginning, the book then proceeds to cover the unique structure of sperm chromatin, the development and use of genomic and proteomic technologies in human sperm assessment, sperm maturation in the epididymis, regulation of sperm motility, interaction of sperm with reactive oxygen species, interaction of sperm with the egg zona pellucida and its clinical applications, basic genetics applicable to sperm biogenesis, sex chromosome abnormalities with consequences for male infertility, epigenetic patterning in male germ cells with focus on DNA methylation (usually omitted from this type of review), and germ cell development from embryonic stem cells that includes an account of the DAZ gene family and the consequences for male infertility from its disruption. The book thus provides a rather complete sweep of the most recent research into all aspects of the human sperm cell. This is most welcome, as nearly a decade has passed since such a treatment has been published. The choice of contributors is admirable: the most active and productive in the field are represented. There is a good mix of basic biology and clinically useful lore in the book, which is itself sturdily constructed and so can withstand constant use in the andrology laboratory as well as on an investigator's desk. One aesthetic and illuminating feature is the inclusion in a center section of color plates as companions to the black and white figures in the text itself. Strengths: All chapters are clearly written, the figures presented are large enough to be readily appreciated, and the figure legends are comprehensive. The editors deserve credit for this show of quality control. A particularly useful aspect of each chapter is the comprehensive list of references; the book thus serves as a large portal to the current literature in the field. The chapters on the genetics relevant to sperm structure and function are welcome. Deficiencies: Inevitably there is some overlap of material among chapters, but this is hardly a problem. The index is a bit sparse but is sufficient to find desired topics. Recommended Readership: Andrologists, students of and investigators in reproductive biology, laboratory directors in infertility services, basic scientists in biology and physiology. Overall Grading: ★★★★
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.003 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.096 | 0.094 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".