| http://www.w3.org/ns/prov#value | - Studies have shown that in a decreasing order of significance the protective factors associated with ovarian cancer are the following: use of oral contraceptive; pregnancy and breastfeeding; ligature of the Fallopian tubes and hysterectomy; prophylactic oophorectomy; and no exposure to agents associated with the disease, such as talcum powder, hormonal therapy and drugs used to treat infertility.1
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