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History Of Birth Control Beginning of Paper Although birth control has been practiced since ancient times, the first organized efforts developed during the 19th century as population increased dramatically because of improved medical care, nutrition, and sanitation. However, birth control met with resistance. In 1873 the Unite .... Middle of Paper .... a rhythmic pattern of menstruation and ovulation that can be identified by keeping a careful record of the dates of menstruation. A second assumption is that ovulation occurs 14 days before the onset of the next menstruation. The rhythm method is the most commonly used of the natural methods. To be used successfully a record should be kept for at least six menstrual cycles. The fertile period is then defined by a set of rules for example: The length of the shortest cycle less 18 days marking the start of the fertile period and the length o .... 455 words | 2 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95