The Biology Of Twins Mammals
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The Biology Of Twins Mammals
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Author : Horatio Hackett Newman
language : en
Publisher:
Release Date : 1917
The Biology Of Twins Mammals written by Horatio Hackett Newman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1917 with Twins categories.
The Biology Of Twins Mammals
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Author : Horatio Hackett Newman
language : en
Publisher: Forgotten Books
Release Date : 2015-06-24
The Biology Of Twins Mammals written by Horatio Hackett Newman and has been published by Forgotten Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-24 with Science categories.
Excerpt from The Biology of Twins (Mammals) The present volume brings together for the first time a considerable mass of data dealing with the phenomenon of twins in man and other mammals. Twins are so inherently interesting to so many people that it is hoped by the writer that some light on how twins "happen" will be welcomed by the general reader as well as by the biologist. There are many thoroughly interesting and nontechnical phases of twin-biology that will appeal to anyone who is a twin or has personal acquaintance with twins. There must be certain other phases of the subject, however, that are largely of value to the professional biologist. It has been the aim of this book to satisfy both the general and the technical reader without sacrificing unduly the demands of simplicity on the one hand or of scientific adequacy on the other. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Biology Of Twins Mammals
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Author :
language : en
Publisher:
Release Date : 1917
Biology Of Twins Mammals written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1917 with categories.
Biology Of Twins Mammals By Horatio Hackett Newman
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Author : Horatio Hackett Newman
language : en
Publisher:
Release Date : 1917
Biology Of Twins Mammals By Horatio Hackett Newman written by Horatio Hackett Newman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1917 with categories.
The Biology Of Twinning In Man
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Author : M. G. Bulmer
language : en
Publisher: Clarendon Press
Release Date : 1970
The Biology Of Twinning In Man written by M. G. Bulmer and has been published by Clarendon Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Embryology, Human categories.
Twins are probably by no means unknown to most people - for instance in the sporting world of my Australian homeland there are quite a number of cases of note - yet very few people understand the biology behind twins. Although this book suffers a good deal from its age - people like Tim Flannery, Tom McMahon, John Rushton, and Michael Laker clearly give evidence that there is something much more "designed" than randomness involved in dizygotic twin frequencies around the world - if you want a basic introduction to the facts about twinning in humans you will get it here without any doubt. Bulmer deals with every aspects of twinning from the frequency of twinning in humans to the liabilities mothers of twins face vis-à-vis those of single children. He also goes into less common detail about the extreme difficulties of higher order multiple births - and provides little-known but easily understandable details about their frequency. Bulmer shows that for most of human history mothers of twins were at huge disadvantages both in terms of their much greater health risks and the low birth mass and short gestation of their children. For this reason, Bulmer shows that only when major health improvements were made could twins compete with singleton children, and he shows this had and has major consequences culturally. Another very interesting sidelight is Bulmer's look at how single birthing evolved as the most productive strategy in humans and other primates (except for the primitive tree shrews). Bulmer compares this with the situation in animals that typically give birth to multiple young. He should, however, have looked at the environmental conditions that encourage singleton births and compare with those animals that give birth to multiple, highly precocial offspring. All in all, though it is certainly dated, "Biology of Twinning in Man" is a simple and useful overview of what most people should know about multiple births in humans.
The Biology Of Twins Mammals
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Author : Horatio Hackett Newman
language : en
Publisher:
Release Date : 1917
The Biology Of Twins Mammals written by Horatio Hackett Newman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1917 with categories.
Reproduction In Mammals
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Author : Virginia Hayssen
language : en
Publisher: JHU Press
Release Date : 2017-10-27
Reproduction In Mammals written by Virginia Hayssen and has been published by JHU Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-27 with Science categories.
"Newborn mammals can weigh as little as a dime or as much as a motorcycle. Some receive milk for only a few days, whereas others nurse for years. Humans typically have only one baby at a time following nine months of pregnancy, but other mammals have 20 or more young after only a few weeks in utero. What causes this incredible reproductive diversity? Reproduction in Mammals is a fascinating examination of the diverse reproductive strategies of a broad spectrum of mammals and the ways in which natural selection has influenced that diversity. While accounts of reproduction in individual taxa abound, this unique book's comprehensive coverage gathers stories from many taxa into a single, cohesive perspective that centers on the reproductive lives of females. The authors shed light on intriguing questions such as: Do bigger moms have bigger babies? Do primates have longer pregnancies than other groups? Do aquatic animals have particular patterns? Do carnivores like lions often produce larger litters than prey species? The book opens with the authors' definition of what constitutes a female perspective and an examination of the evolution of reproduction in mammals. It then outlines the individual female: her genetics, anatomy, and physiology. From this nuanced basis, the text progresses to mirror the female reproductive cycle and includes her interactions with males and offspring. The final section contextualizes the reproductive cycle within the rest of the world--both abiotic and biotic environments. To close, the authors include dedicated chapters on human concerns: conservation and women as mammals. Readers will come away from this thought-provoking book with an understanding not only of how reproduction fits into the lives of female mammals but also of how biology has affected the enormously diverse reproductive patterns of the phenotypes we observe today."-- Provided by publisher.
Australian Mammal Society
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Author :
language : en
Publisher:
Release Date : 1989-06
Australian Mammal Society written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989-06 with categories.
Use Of Laboratory Animals In Biomedical And Behavioral Research
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1988-02-01
Use Of Laboratory Animals In Biomedical And Behavioral Research written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988-02-01 with Science categories.
Scientific experiments using animals have contributed significantly to the improvement of human health. Animal experiments were crucial to the conquest of polio, for example, and they will undoubtedly be one of the keystones in AIDS research. However, some persons believe that the cost to the animals is often high. Authored by a committee of experts from various fields, this book discusses the benefits that have resulted from animal research, the scope of animal research today, the concerns of advocates of animal welfare, and the prospects for finding alternatives to animal use. The authors conclude with specific recommendations for more consistent government action.
Scientific And Medical Aspects Of Human Reproductive Cloning
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2002-06-17
Scientific And Medical Aspects Of Human Reproductive Cloning written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-06-17 with Science categories.
Human reproductive cloning is an assisted reproductive technology that would be carried out with the goal of creating a newborn genetically identical to another human being. It is currently the subject of much debate around the world, involving a variety of ethical, religious, societal, scientific, and medical issues. Scientific and Medical Aspects of Human Reproductive Cloning considers the scientific and medical sides of this issue, plus ethical issues that pertain to human-subjects research. Based on experience with reproductive cloning in animals, the report concludes that human reproductive cloning would be dangerous for the woman, fetus, and newborn, and is likely to fail. The study panel did not address the issue of whether human reproductive cloning, even if it were found to be medically safe, would beâ€"or would not beâ€"acceptable to individuals or society.