A new method for estimating the effectiveness of emergency contraception that accounts for variation in timing of ovulation and previous cycle length. Mikolajczyk RT, Stanford JB.Fertil Steril. 2005 Jun;83(6):1764-70.PMID: 15950649 Read More GynecologyNaomi Whittaker, MDJune 1, 2005Contraception, Effectiveness, Full TextComment