Margaret Higgins Sanger born September 14, 1879, was an American birth control activist, sex educator, writer, and nurse. Sanger popularized the term "birth control", opened the first birth control clinic in the United States, and established organizations that evolved into the Planned Parenthood Federation of America.

Sanger used her writings and speeches primarily to promote her way of thinking. She was prosecuted for her book Family Limitation under the Comstock Act in 1914. She was afraid of what would happen, so she fled to Britain until she knew it was safe to return to the US.

Sanger's efforts contributed to several judicial cases that helped legalize contraception in the United States. Sanger drew a sharp distinction between birth control and abortion and was opposed to abortion through the bulk of her career.

In 1916, Sanger opened the first birth control clinic in the United States, which led to her arrest for distributing information on contraception, after an undercover policewoman arrested her. Sanger endured much controversy.

In 1929, she formed the National Committee on Birth Control, which served as the focal point of her lobbying efforts to legalize contraception in the United States. From 1952 to 1959, Sanger served as president of the International Planned Parenthood Federation. She died in 1966, and is widely regarded as a founder of the modern birth control movement.

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