"We now have a clearer picture of the cancer risks associated with combined oral contraception. Compared with non-users, current users have an increased risk of being diagnosed with breast,11 cervical,12 or hepatocellular cancer.13 Hepatocellular cancer is rare in developed countries. The breast and cervical cancer risks decline after stopping oral contraception, returning to that of non-users within about 10 years.11,12 Conversely, combined oral contraceptive users have a reduced risk of endometrial,13 ovarian,14 and colorectal cancer.13 The ovarian and endometrial benefits appear to persist for many years after stopping oral contraception, perhaps more than 15 years.13,14 Limited evidence suggests that today's lower oestrogen dose formulations provide similar protection against endometrial and ovarian cancer as older, higher-dose preparations.15,16 At least within the RCGP cohort, the long-term cancer benefits appear to counterbalance the short-term harmful ones; indeed there may even be a net public health gain.8 Collectively, the research shows that benefits of oral contraception use outweigh risks, when provided appropriately. Importantly, prolonged use of oral contraception does not appear to reduce future fertility.17"