August 2003 Abortion, contraceptive use, and adolescent pregnancy among first-year medical students at a major public university in Mexico City
July 2003 Modifying the Yuzpe regimen of emergency contraception: A multicenter randomized controlled trial
June 2003 Extending the time limit for starting the Yuzpe regimen of emergency contraception to 120 hours
March 2003 Effectiveness of the Yuzpe regimen of emergency contraception by cycle day of intercourse: Implications for mechanism of action
