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: Combined oral contraceptive use reduces the risk of ovarian cancer by 40%.   The risk of endometrial cancer is cut by 50% compared non-users. Oral pregnancy protection use reduces the risk of ovarian cancer by 40% and the risk of endometrial cancer by 50%. Never users of combined contraceptives have a higher risk of getting ovarian cancer by 40% and endometrial cancer by 50%. Combined birth control use reduces the risk of ovarian cancer by 40%. It lowers the risk of endometrial cancer by 50%. Use of Combined oral contraceptive lowers the risk of ovarian cancer by 40%. It also lowers the risk of endometrial cancer by 50%, compared to never users. Combined oral contraceptive use lowers ovarian cancer by 40% and endometrial cancer by 50% compared to people who do not use it. Oral birth control reduces the risk of ovarian cancer by 40% and the risk of 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 people who don't use one.. Using an oral contraceptive reduces ovarian cancer by 40% and endometrial cancer by 50% versus those who never use one. Combined oral contraceptive use reduces the risk of ovarian cancer by 40%. Also, it reduces the risk of endometrial cancer by 50% compared to non-users.