Margaret Sanger is known to have played an extremely important role in the legalization of birth control measures. In 1916 she opened a birth control clinic in the United States which led to her subsequent arrest. She was a firm believer in the use of contraceptives by women to regulate pregnancies and avoid abortions.
After her arrest, she made an appeal on the case and won in 1918. The court ruling ordered that doctors were free to prescribe contraceptives and encourage family planning.