A Randomized, Controlled Trial of Levonorgestrel Vs. The Yuzpe Regimen as Emergency Contraception Method among Iranian Women.

Background: We aimed to compare acceptability of Levonorgestrel with the Yuzpe regimen among Iranian women based on their side-effects and resulting changes in the amount and pattern of menses.

Methods: Five hundred twenty nine participants aged 15-49 having regular menses and one act of unprotected intercourse within 72 h were included in the double-blind, controlled trial in 2006-2007 and randomly assigned into LNG (n=263) and HD (n=266) groups, receiving Levonorgestrel 0.75 mg given 12 h apart and ethinyl estradiol 100 μg plus 0.