Since the 1970s, behavioural ecologists and evolutionary biologists have been fascinated by the biological implications of sperm from different males competing for fertilization of the egg in the female reproductive tract. But until Human Sperm Competition there had never been a discussion of the phenomenon for the human species in book form, despite its relevance for a full understanding of human reproduction.The book is a pioneering analysis of the evolutionary biology of human se...

The next time you get sick, consider this before picking up the aspirin: your body may be doing exactly what it's supposed to. In this ground-breaking book, two pioneers of the science of Darwinian medicine argue that illness as well as the factors that predispose us toward it are subject to the same laws of natural selection that otherwise make our bodies such miracles of design. Among the concerns they raise:When may a fever be beneficial?Why do pregnant women get morning ...

Why do we need sleep? How much sleep is enough? What is sleep? What happens when we don't get enough? We spend about a third of our lives asleep - it plays a crucial role in our health and wellbeing. References to sleep abound in literature and art, and sleep has been recognized as fundamental to the human condition for thousands of years. Over the past century, our knowledge of how sleep occurs, what it does, and what happens to our health if we do not have enough has developed h...

As you prepare to become a mother, you face an experience unlike any other in your life. Having a baby will redirect your preferences and pleasures and, most likely, will realign some of your values.As you undergo this unique psychological transformation, you will be guided by new hopes, fears, and priorities. In a most startling way, having a child will influence all of your closest relationships and redefine your role in your family's history. The charting of this remarkable, new realm i...

Previously published as part of DON'T SWALLOW YOUR GUM!People have more access to medical information than ever before, and yet we still believe "facts" about our bodies and health that are just plain wrong. MYTHS ABOUT SEX AND PREGNANCY takes on SOME these myths and misconceptions, and exposes the truth behind some of those weird and worrisome things we wonder about. Entries dispel the following myths and more:- Men with big feet have bigger penises- If you shave you...

Thirty million men suffer from some form of erectile dysfunction, according to recent estimates. Though unwelcome and embarrassing, it doesn't have to end a couple's sex life. Both informative and practical, "Sexual Impotence - Coping with Erectile Dysfunction" gives couples cause for hope.This book includes practical treatments which are used to cure patients who are seeking a solution to overcome ED (Erectile Dysfunction) which is common in many people who live under stress. All t...

In recent years there have been exciting scientific discoveries about a hormone whose amazing role in the human body has long been neglected. Oxytocin is the powerful hormone involved in bonding, sex, and childbirth, as well as in relaxation and feelings of calm. It is the mirror image of the stress hormone adrenaline, which triggers the 'fight or flight' systems in the body. Much has been written about the latter, but the many-sided importance of oxytocin is at this point only known to th...

The extraordinary role of viruses in evolution and how this is revolutionising biology and medicine.Darwin's theory of evolution is still the greatest breakthrough in biological science. His explanation of the role of natural selection in driving the evolution of life on earth depended on steady variation of living things over time – but he was unable to explain how this variation occurred. In the 150 years since publication of the Origin of Species, we have discovered three main s...

'Postnatal' is the fourth title in the Midwifery Essentials series and explores contemporary postnatal care for women and their families, exploring the role of the midwife as a member of the multi-professional team. This book thoroughly prepares the reader to provide safe, evidence-based, woman-centred postnatal care for mothers and their babies. - The postnatal examination of the woman, and the baby check - Care of the baby in the immediate postnatal period - The features of the normal ne...

A brilliant writer, first-time mother, and respected biologist, Sandra Steingraber tells the month-by-month story of her own pregnancy, weaving in the new knowledge of embryology, the intricate development of organs, the emerging architecture of the brain, and the transformation of the mother's body to nourish and protect the new life. At the same time, she shows all the hazards that we are now allowing to threaten each precious stage of development, including the breast-feeding relationsh...

By carefully examining the biological, genetic, evolutionary, and psychological evidence, a noted biologist finds a shocking lack of substance behind ideas about biologically based sex differences. Features a new chapter and afterward on recent biological breakthroughs.

The complete DNA molecules comprising the human genome were deciphered two decades ago. With this discovery began a remarkable genomic voyage back in time yielding a new science of human evolution. We are just beginning to unravel our full genomic history and answering age-old questions about how and when we evolved. For the first time, we are finding our ancestors in our genome and gleaning tantalizing clues about our past. Molecular anthropologist Eugene E. Harris now gives us an updated...