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 United States Congress enacted the Comstock Law, which prohibited the distribution of birth-control devices and information. During the early 1900s, American nurse Margaret Sanger led the birth-control movement in the United States. She and others opened clinics to prov ....