115 products were found matching your search for sperm in 3 shops:

Finally, the answer to why, when it comes to romance, women are coy and men are just clueless--explained from the micro standpoint. Who would have guessed that all of our sexual and social behavior, and even our physical appearance, could be attributed to what our tiny unseen reproductive cells are doing? But that's Quirk's thesis in this highly entertaining book from an Average Guy that's a fun read full of a-ha! moments for scientists and civilians alike. Learn facts about cheating you'll never see on "Jerry Springer," like how unfaithful females actually change the biology of their mates. Discover why most sperm couldn't care less if they never saw an egg, what makes men yell "woo!" in a feminine falsetto--very similar to the mating cry of the Siamang gibbon--and, most important, the surprising answer on what to wear to attract that alpha mate.

Sperm Competition and the Evolution of Animal Mating Systems [Hardcover] [Dec 01, 1984] Smith, Robert L. ...

Add some humor to your casual look by rocking thisVarsity Swimming Sperm T Shirtas part of your outfit. Any Danny Duncan fan will love adding this hilarious tee to their collection. Officially licensed Crewneck Short sleeves Material: Cotton Care: Machine wash; tumble dry low Imported This shirt is Unisex Sizing only For a fitted look, order one size smaller than your normal size Note: This item is print to order and may have a 1-2 day extra processing time

Add some humor to your casual look by rocking thisVarsity Swimming Sperm T Shirtas part of your outfit. Any Danny Duncan fan will love adding this hilarious tee to their collection. Officially licensed Crewneck Short sleeves Material: Cotton Care: Machine wash; tumble dry low Imported This shirt is Unisex Sizing only For a fitted look, order one size smaller than your normal size Note: This item is print to order and may have a 1-2 day extra processing time

Add some humor to your casual look by rocking thisVarsity Swimming Sperm T Shirtas part of your outfit. Any Danny Duncan fan will love adding this hilarious tee to their collection. Officially licensed Crewneck Short sleeves Material: Cotton Care: Machine wash; tumble dry low Imported This shirt is Unisex Sizing only For a fitted look, order one size smaller than your normal size Note: This item is print to order and may have a 1-2 day extra processing time

Argues that men inately believe their sperm will be competing with that of other men for the opportunity to fertilize an egg, and that women unconsciously promote this competition

This revolutionary book demonstrates that sexual behavior is driven by neither the psyche nor the conscious mind, but by biological imperatives programmed into us millions of years ago. Argues that a man's sexual behavior is based on the expectation that his sperm will have to compete with other men's sperm to fertilize the descending egg, & women are programmed to promote this sperm warfare. Uses a series of fictional scenes involving some form of sexual contact, followed by an interpretation of each scene from the viewpoint of an evolutionary biologist. Provides a strikingly original & fascinating window into sexual behavior.

Sperm Biology represents the first analysis of the evolutionary significance of sperm phenotypes and derived sperm traits and the possible selection pressures responsible for sperm-egg coevolution. An understanding of sperm evolution is fast developing and promises to shed light on many topics from basic reproductive biology to the evolutionary process itself as well as the sperm proteome, the sperm genome and the quantitative genetics of sperm. The Editors have identified 15 topics of current interest and biological significance to cover all aspects of this bizarre, fascinating and important subject. It comprises the most comprehensive and up-to-date review of the evolution of sperm and pointers for future research, written by experts in both sperm biology and evolutionary biology. The combination of evolution and sperm is a potent mix, and this is the definitive account.The first review survey of this emerging fieldWritten by experts from a broad array of disciplines from the physiological and biomedical to the ecological and evolutionarySheds light on the intricacies of reproduction and the coevolution of sperm, egg and reproductive behavior

Add some humor to your casual look by rocking thisVarsity Swimming Sperm T Shirtas part of your outfit. Any Danny Duncan fan will love adding this hilarious tee to their collection. Officially licensed Crewneck Short sleeves Material: Cotton Care: Machine wash; tumble dry low Imported This shirt is Unisex Sizing only For a fitted look, order one size smaller than your normal size Note: This item is print to order and may have a 1-2 day extra processing time

Add some humor to your casual look by rocking thisVarsity Swimming Sperm T Shirtas part of your outfit. Any Danny Duncan fan will love adding this hilarious tee to their collection. Officially licensed Crewneck Short sleeves Material: Cotton Care: Machine wash; tumble dry low Imported This shirt is Unisex Sizing only For a fitted look, order one size smaller than your normal size Note: This item is print to order and may have a 1-2 day extra processing time

Add some humor to your casual look by rocking thisVarsity Swimming Sperm T Shirtas part of your outfit. Any Danny Duncan fan will love adding this hilarious tee to their collection. Officially licensed Crewneck Short sleeves Material: Cotton Care: Machine wash; tumble dry low Imported This shirt is Unisex Sizing only For a fitted look, order one size smaller than your normal size Note: This item is print to order and may have a 1-2 day extra processing time

Published to acclaim and controversy a decade ago, Sperm Wars is a revolutionary thesis about sex that turned centuries-old biological assumptions on their head. Evolution has programmed men to conquer and monopolize women while women, without ever knowing they are doing it, seek the best genetic input on offer from potential sexual partners. In this book, best-selling author Robin Baker reveals these new facts of life: ten percent of children are not fathered by their "fathers;" less than one percent of a man's sperm is capable of fertilizing anything (the rest is there to fight off all other men's sperm); "smart" vaginal mucus encourages some sperm but blocks others; and a woman is far more likely to conceive through a casual fling than through sex with her regular partner. It's no wonder that Sperm Wars is a classic of popular science writing that will surprise, entertain, and even shock.

This book describes about 30 years of theoretical, empirical, and experimental work on butterfly sperm competition. It considers the reproductive morphology and sperm utilisation interests of males and females, which shape the mating tactics of each sex. Females of most butterfly species mate multiple times throughout their lives. The reasons are explored, as well as the numerous adaptations males have developed to prevent future mating and fertilisation by the sperm of other males. In particular, this volume focuses on the role of apyrene sperm. Eupyrene and apyrene sperm dimorphism is most likely a key factor in sperm competition, and the study in butterflies promotes understanding of sexual selection across animal species with sperm polymorphism. This book, describing the evolutionary causes and consequences of the sperm competition in butterflies, is a recommended read for students of behavioural ecology.

Famed in story as "the great leviathans," sperm whales are truly creatures of extremes. Giants among all whales, they also have the largest brains of any creature on Earth. Males can reach a length of sixty-two feet and can weigh upwards of fifty tons. With this book, Hal Whitehead gives us a clearer picture of the ecology and social life of sperm whales than we have ever had before. Based on almost two decades of field research, Whitehead describes their biology, behavior, and habitat; how they organize their societies; and how their complex lifestyles may have evolved in this unique environment. Among the many fascinating topics he explores is the crucial role that culture plays in the life of the sperm whale, and he traces the consequences of this argument for both evolution and conservation. Finally, drawing on these findings, Whitehead builds a general model of how the ocean environment influences social behavior and cultural evolution among mammals as well as other animals. The definitive portrait of a provocative creature, Sperm Whales will interest animal behaviorists, conservationists, ecologists, and evolutionary biologists as well as marine mammalogists.

Sperm Competition and the Evolution of Animal Mating Systems [Hardcover] [Dec 01, 1984] Smith, Robert L. ...

Paperback. Sperm Wars turns the conventional thinking about the biology of sex on its head. Evolutionary biologist Robin Baker argues that human sexuality follows certain laws, and all of those laws are governed by one thing: sperm warfare. In the interest of promoting competition between sperm to fertilize the same egg, evolution has built men to conquer and monopolize women while women, without ever knowing they are doing it, seek the best genetic input on offer from potential sexual partners. In this book, Baker reveals, through a series of provocative fictional scenes, the far-reaching implications of sperm competition: ten percent of children are not fathered by their "fathers;" less than one percent of a man's sperm is capable of fertilizing anything (the rest is there to fight off all other men's sperm); "smart" vaginal mucus encourages some sperm but blocks others; and a woman is far more likely to conceive through a casual fling than through sex with her regular partner. From infidelity, to homosexuality, to the female orgasm, Sperm Wars turns on every light in the bedroom. Two decades after its initial publication, this classic of popular science will still surprise, entertain, and even shock. The classic work on the rules of sex, still as provocative as the day it was published, updated for a new generation. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.

Originally published in 2006, this is a comprehensive and definitive account of the human male gamete. The volume summarizes many unique and revealing characteristics of the sperm cell. It provides a detailed overview of human sperm production, maturation and function, and looks at how these processes affect and influence fertility, infertility and ART. The volume thus provides a detailed review of the most important research and developments, augmented with pertinent references. This book will appeal to all practitioners and scientists in reproductive medicine and in particular to clinical scientists, graduate and post-graduate scientists, and laboratory personnel.

Unread book in perfect condition.

Unread book in perfect condition.

Behavioural ecologists and evolutionary biologists have long been interested in the biological implications of sperm from different males competing for fertilization of the egg in the female tract. This book discusses these implications for human sexual behaviour and human infertility problems.