If you're on birth control, you might wonder if this affects your risk for cancers. The different types of birth control, from pills to IUDs to shots, sometimes increase and sometimes decrease your risk of certain cancers. Study results suggest that with some hormonal types of birth control, the risk of both breast and cervical cancer may be increased. This may be due to the fact that some hormones, such as estrogen and progesterone, at times can fuel the growth of some types of cancers. These risks, however, are minor and usually resolve after one stops birth control methods. On the other hand, birth control reduces the risk of ovarian, uterine, and colon cancer. The longer you use birth control, the more protection you get from these cancers. They believe this is due to the reason that birth control reduces ovulation and controls the hormonal level, making it difficult for some cancers to start. On a whole, birth control is associated with both risk and protection; its effect on cancer depends on the type of cancer and the duration of use. If one is concerned about the risk for cancer, then discuss it with your doctor to find the best option. Birth control is safe for the majority of women, and the advantages outweigh the risks.