Contraception: Freedom from Fear

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have women in fertile all their lives, except when they specifically wanted to conceive, and then switch on their fertility with a pill or a shot. If that sounds far out, so did the pills themselves, when such men as Dr. Rock began their research less than 20 years ago.

^{* The collective name used for convenience for at least three of the female sex hormones, now applied also to synthetic chemicals of similar molecular structure. *Made by Norman B. Ryder, director of the University of Wisconsin's Center for Demography and Ecology, and Charles F. Westoff, associate director of Princeton University's Office of Population Research, and reported to the Notre Dame Conference on Population last December. †A play on the safety poster: "Ninety percent of accidents are caused by people."}