Gynaecology & Obstetrics Emergency Contraception - Ulipristal acetate (UPA) 18c21c14 Emergency contraceptive contains? A Estradiol B Levonorgestrel C Estrone D PGE. High-Yield Explanation ANSWER: (B) LevonorgestrelREF: Shaw 13th ed p. 233"The post coital pill or emergency pill or morning after pill contains levonorgesterol (LNG)"