The sexual revolution was prepared by a "first wave" of pioneers who campaigned against the sexual repression which was common in the 19th century. This change began, roughly, at the end of the 19th and start of the 20th century. One impetus came from the pioneers of birth control and family planning. The books and publicity of Marie Stopes in England and Margaret Sanger in the United States, changed the lives of many women.
ð ə WORD_BOUNDARY s ɛ k ʃ uː ə l WORD_BOUNDARY ɹ ɛ v ə l uː ʃ ə n WORD_BOUNDARY w ʌ z WORD_BOUNDARY p ɹ ɪ p ɛ ɹ d WORD_BOUNDARY b aɪ WORD_BOUNDARY ʌ WORD_BOUNDARY f ɜː s t WORD_BOUNDARY w eɪ v WORD_BOUNDARY ʌ v WORD_BOUNDARY p aɪ ə n ɪ ɹ z WORD_BOUNDARY h uː WORD_BOUNDARY k æ m p eɪ n d WORD_BOUNDARY ʌ ɡ ɛ n s t WORD_BOUNDARY ð ə WORD_BOUNDARY s ɛ k ʃ uː ə l WORD_BOUNDARY ɹ ɪ p ɹ ɛ ʃ ə n WORD_BOUNDARY w ɪ t̠ʃ WORD_BOUNDARY w ʌ z WORD_BOUNDARY k ɑ m ə n WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY n aɪ n t iː n θ WORD_BOUNDARY s ɛ n t̠ʃ ə ɹ ɹ i WORD_BOUNDARY ð ɪ s WORD_BOUNDARY t̠ʃ eɪ n d̠ʒ WORD_BOUNDARY b ɪ ɡ æ n WORD_BOUNDARY ɹ ʌ f l i WORD_BOUNDARY æ t WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɛ n d WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY n aɪ n t iː n θ WORD_BOUNDARY æ n d WORD_BOUNDARY s t ɑ ɹ t WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY t w ɛ n t iə θ WORD_BOUNDARY s ɛ n t̠ʃ ə ɹ ɹ i WORD_BOUNDARY w ʌ n WORD_BOUNDARY ɪ m p ə t ə s WORD_BOUNDARY k eɪ m WORD_BOUNDARY f ɹ ʌ m ð ə WORD_BOUNDARY p aɪ ə n ɪ ɹ z WORD_BOUNDARY ʌ v WORD_BOUNDARY b ɜː θ WORD_BOUNDARY k ə n t ɹ oʊ l WORD_BOUNDARY æ n d WORD_BOUNDARY f æ m ɪ l i WORD_BOUNDARY p l æ n ɪ ŋ WORD_BOUNDARY ð ə WORD_BOUNDARY b ʊ k s WORD_BOUNDARY æ n d WORD_BOUNDARY p ʌ b l ɪ s ɪ t i WORD_BOUNDARY ʌ v WORD_BOUNDARY m ə ɹ ɹ iː WORD_BOUNDARY s t oʊ p s WORD_BOUNDARY ɪ n WORD_BOUNDARY ɪ ŋ ɡ l ə n d WORD_BOUNDARY æ n d WORD_BOUNDARY m ɑ ɹ ɡ ɹ ə t WORD_BOUNDARY s æ n d̠ʒ ə ɹ ɹ WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY j uː n aɪ t ɪ d WORD_BOUNDARY s t eɪ t s WORD_BOUNDARY t̠ʃ eɪ n d̠ʒ d WORD_BOUNDARY ð ə WORD_BOUNDARY l aɪ v z WORD_BOUNDARY ʌ v WORD_BOUNDARY m ɛ n i WORD_BOUNDARY w ɪ m ɪ n WORD_BOUNDARY