second-generation oral contraceptive

second-generation oral contraceptive

Gynecology A levonorgestrol-based OC, which has an ↑ risk of acute MI relative to third-generation OCs. See Oral contraceptive. Cf Third-generation oral contraceptive.
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The study found that the risk was mostly limited to current users, those who had just started using contraception, and those using older first- and second-generation oral contraceptives instead of third-generation ones.