Hormone Replacement Therapy
There is a forty percent increase in the risk of developing ovarian cancer in a patient who uses hormone replacement therapy than one who does not. Hormone replacement therapy that only contains estrogen increases a woman's risk of ovarian cancer just as much as hormone replacement therapy containing both estrogen and progesterone. The highest risk of ovarian cancer in post-menopausal women who utilize hormone replacement therapy is when they undergo this therapy for long periods, such as five or ten consecutive years. The longer a post-menopausal woman uses hormone replacement therapy continuously, the greater their risk becomes of developing breast or ovarian cancer. When a post-menopausal woman stops using hormone replacement therapy entirely, their risk of developing ovarian and breast cancer decreases slowly over several years. The exact rate of risk decrease depends on how long the patient used hormone replacement therapy.
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