Women who have used injectable or oral birth control in the past are at a significantly higher relative risk of invasive breast cancer, but they are at significantly lower risk of ovarian cancer, according to a new study based on black women in South Africa. As more time passed after a woman stopped using the contraceptives, her increased risk diminished.
The study, published in PLoS Medicine, pulled self-reported data from 5,702 participants with newly diagnosed invasive breast, cervical, ovarian or endometrial cancers. There were 1,492 women in the study who served as controls. They had other types of cancers, including colon, rectal and non-Hodgkin lymphoma, which are not influenced by contraceptive use.
Among the participants, 26 percent of women had used injectable hormones and 20 had used pills. After adjusting for confounding factors, including age, education, smoking and number of sexual partners, researchers found women were 1.7 times more likely to develop breast cancer and 1.4 times more likely to get cervical cancer than women who had never taken the contraceptives.
About 50 percent of women with breast cancer had used oral or injectable contraceptives whereas 26 percent of women with ovarian cancer had used the contraceptives and 17 percent with endometrial cancer had used them.
In women who had used birth control pills or injectable contraceptives, the cancer risk diminished with time after a woman’s last use of the birth control, the authors wrote.
Read More at ABC NEWS.
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September marks the end of summer and the beginning of fall. It is the start of school for many people and the time for people to come home from the beach and return to their real lives. It is also National Ovarian Cancer Awareness Month. Ovarian Cancer is one of the most deadly cancers for women. This month make sure to sport lots of teal in support of ovarian cancer awareness! Here we have 4 symptoms that have been shown to lead to ovarian cancer.
