Ovarian cancer risk has been reduced from oral contraceptive usage

"Over the last 2 decades, ovarian cancer incidence and mortality for younger generations have been declining in most developed countries, and the decline has been greatest in countries where OC use had spread earlier. The overall estimated protection from cohort and case-control studies is approximately 30% for ever OC users, and increases with duration of use by approximately 5% per year of use to about 50% for long-term ({{>=}}10 years) users," scientists in Italy reported.

"The favourable effect of OC against ovarian cancer risk persists for at least 20 years after OC use...

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