How much does hormone replacement therapy play in the development of ovarian cancer?

Breast cancer: Hormone replacement therapy has been linked to higher incidence of breast cancer, but not ovarian cancer.

Probably none: There does not appear to be a correlation with hormone replacement therapy and ovarian cancer. Nevertheless, i always balance estrogen treatment with progesterone. There is some evidence that women estrogen dominance (overweight, infertile, polycystic ovaries and women who don't ovulate) have higher estrogen dependent cancers like breast, colon, uterine and ovarian. It's all about balance.