Effectiveness of Orally Dosed Emergency Contraception in Obese Women - LNG

Obese women are significantly more likely than their normal BMI counterparts to experience failure of orally-dosed emergency contraceptives. The PI\'s preliminary data provides evidence for testing a dose escalation strategy in an effort to provide improved efficacy from orally-dosed emergency contraceptives in obese women. The overall project will be focused on both levonorgestrel (LNG) - and ulipristal acetate-containing emergency contraception but this protocol registration is for the LNG aspect of the study procedures.