Which controversial factor may actually lower a woman’s risk for ovarian cancer but has also been implicated in increasing the risk of breast cancer?

One of the controversial factors that may actually lower a woman’s risk for ovarian cancer but has also been implicated in increasing the risk of breast cancer would be using "hormone replacement therapy post-menopausal." In addition, this kind of treatment generally helps to lessen the side effects of menopause.

Where are the following

Is this used on a test? ?