Throughout the 1920s, Stopes and other feminist pioneers, including Dora Russell and Stella Browne, played a major role in breaking down taboos about sex and increasing knowledge, pleasure and improved reproductive health. Stopes was particularly influential in helping emerging birth control movements in a number of British colonies.[46] In 1930 the National Birth Control Council was formed. Stella Browne's initial activism was limited to giving speaking tour across the country, providing information on birth control, women’s health problems, problems related to puberty and sex education.[47][48] In 1929 began to openly call for the legalization of abortion, during her lecture in front of the World Sexual Reform Congress in London.[49] In April 1930 the Birth Control Conference assembled 700 delegates and was successful in bringing birth control and abortion into the political sphere -[50] three months later, the Ministry of Health allowed local authorities to give birth control advice in welfare centres.