Family Member or Loved One
That is a great question - and it is a question that researchers continue to ask...
According to the National Cancer Institute, a woman’s risk of developing breast cancer depends on several factors, some of which are related to her natural hormones. Hormonal factors that increase the risk of breast cancer include conditions that may allow high levels of hormones to persist for long periods of time, such as beginning menstruation at an early age (before age 12), experiencing menopause at a late age (after age 55), having a first child after age 30, and not having children at all.
One study found that that women who were current or recent users of birth control pills had a slightly elevated risk of developing breast cancer. Interestingly, this same study suggested that 10 or more years after women stopped using oral contraceptives, their risk of developing breast cancer returned to the same level as if they had never used birth control pills, regardless of family history of breast cancer, reproductive history, geographic area of residence, ethnic background, differences in study design, dose and type of hormone, or duration of use. However, another study indicated that current or former use of oral contraceptives did not significantly increase the risk of breast cancer.
Overall, there is not currently any conclusive evidence about the link between oral contraceptives an breast cancer.