How We Do It
The Evolution and Future of Human Reproduction
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- ¥2,800
発行者による作品情報
Despite the widespread belief that natural is better when it comes to sex, pregnancy, and parenting, most of us have no idea what "natural" really means; the origins of our reproductive lives remain a mystery. Why are a quarter of a billion sperm cells needed to fertilize one egg? Are women really fertile for only a few days each month? How long should babies be breast-fed?
In How We Do It, primatologist Robert Martin draws on forty years of research to locate the roots of everything from our sex cells to the way we care for newborns. He examines the procreative history of humans as well as that of our primate kin to reveal what's really natural when it comes to making and raising babies, and distinguish which behaviors we ought to continue -- and which we should not. Although it's not realistic to raise our children like our ancestors did, Martin's investigation reveals surprising consequences of -- and suggests ways to improve upon -- the way we do things now. For instance, he explains why choosing a midwife rather than an obstetrician may have a greater impact than we think on our birthing experience, examines the advantages of breast-feeding for both mothers and babies, and suggests why babies may be ready for toilet training far earlier than is commonly practiced.
How We Do It offers much-needed context for our reproductive and child-rearing practices, and shows that once we understand our evolutionary past, we can consider what worked, what didn't't, and what it all means for the future of our species.
PUBLISHERS WEEKLY
Martin, an anthropologist and curator at Chicago's Field Museum, covers every aspect of human reproduction from fertilization to infant care in this thoughtful, well-written book. He takes an evolutionary approach throughout, exploring similarities and differences between humans, our primate relatives, and mammals in general, in an attempt to understand the origins of many of our behaviors and physiological patterns, and how these have changed, and continue to change as time goes on. Martin discusses the production of gametes (sperm counts have experienced a significant and shocking decline over the past 50 years), the patterns and purpose of menstruation, the value and cost of breast-feeding, and various mechanisms of contraception, among other interesting topics. His comparative analysis and expertise permits him to draw compelling conclusions, as he does in his examination of the reproductive tracts of mammals: "All evidence combined indicates that the reproductive systems of both men and women are adapted for a one-male mating context with little sperm competition." But he also raises thought-provoking questions, such as why so many sperm on the order of 250 billion are released when only one can inseminate the egg. The only disappointment is that, despite the book's subtitle, Martin spends less than a single page looking at the "future of human reproduction." Glossary.
