About two-thirds of women with breast cancer have tumors that contain hormone receptors. This means a tumor has receptors for the hormone estrogen (called ER-positive) or the hormone progesterone.
The Birth Control Pill and Breast Cancer Risk found that women with a strong family history of breast cancer may have up to an 11 times higher risk of breast cancer if they have ever taken the.
They also looked up how many of the women were diagnosed with invasive breast cancer. During follow-up, 11,517 cases of breast cancer were diagnosed among the women. The researchers found that women who used hormonal contraceptives had a slightly higher risk of breast cancer than women who had never used hormonal contraceptives.
76 rows · About Breast Cancer: Breast cancer is a malignant growth that begins in the tissues of the .