Drawing on past speculation and present knowledge, reproductive biologist David Bainbridge conducts us through the forty weeks of a human pregnancy, from conception to breastfeeding, explaining the complex biology behind human gestation in a clear and unassuming manner. Making Babies sets the latest findings in pregnancy biology in a challenging evolutionary, historical, and sociological context, proving that when it comes to drama, pregnancy has it all: sibling rivalry, a battle of the sexes, and a crisis of gender identity. Along the way, Bainbridge revisits some of the key puzzles about pregnancy: What's sex got to do with it? How does the fetus hijack its mother's immune system? What is the point, if any, of morning sickness? Just how does a fertilized ovum develop into eight pounds or so of baby, with ten fingers and ten toes? Does the baby or the mother control the onset of labor, and why is it such an ordeal for them both? Entertaining and informative, Making Babies shows how the study of human pregnancy can help us understand our genesis as individuals and our evolution as a species, and provide insight into who we are and why we behave as we do.