Researchers are currently developing a contraceptive which works through a woman's immune system. They act by provoking an auto-immune response tricking the body into attacking its own reproductive hormones as though they were some kind of infection. This book argues that public debate is essential before immunological contraceptives become a way of life for women. Will the new contraceptives be reliable? Are the results reversible? Can the safety of women and their future children be assured? Does their design make coercion and abuse likely? These are some of the questions raised by this book.