original: combined oral contraceptive use reduces the risk of ovarian cancer by 40 % and the risk of endometrial cancer by 50 % compared to never users .
simplifications: oral contraceptive use reduces the risk of ovarian cancer by 40 % and the risk of endometrial cancer by 50 % , compared to non-use . oral contraceptive use reduces the risk of ovarian cancer by 40 % and endometrial cancer by 50 % . combined oral contraceptive use reduces the risk of ovarian cancer by 40 % and the risk of endometrial cancer by 50 % compared to non-users . combined oral contraceptive use lowers the chance of ovarian cancer by 40 % and the chance of endometrial cancer by 50 % compared to never users . oral contraceptive use reduces the risk of ovarian cancer by 40 % and the risk of endometrial cancer by 50 % compared to those who never used them . oral birth control use lessens the risk of ovarian cancer by 40 % and the risk of endometrial cancer by 50 % compared to people who do not use oral birth control . it 's been found that those who use combined oral contraceptives can reduce their risk of ovarian cancer by 40 % and their risk of endometrial cancer by 50 % as compared to those who do not use any form of contraception . when combined , oral contraceptive use reduces ovarian cancer by 40 % and endometrial cancer by 50 % , compared to women never using oral contraception .