Medicine: Birth Control by Rule?

Last fortnight the Federal Trade Commission ordered Scientific Instruments, Inc. of Chicago to "cease and desist from representing . . . that its birth control device, The Rule of Life, or O. K. Calendar or any other device operating upon the same theory, provides a method of complete, or any definitely stated percentage, of birth control."

Original rhythm boys were Gynecologists Kyusaku Ogino of Japan and Hermann Knaus of Prague. They found that every woman has a sterile period of about two weeks in her menstrual cycle, concluded that such periods could be calculated as accurately as astronomers chart eclipses of the...

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