Estimating the efficacy of emergency contraception.
Mikolajczyk
Rafael T
RT
Stanford
Joseph B
JB
D003281:Contraceptives, Postcoital; D004630:Emergencies; D004717:Endometrium / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008597:Menstrual Cycle; D015588:Observer Variation; D010053:Ovary / Q000000981:diagnostic imaging*; D010060:Ovulation; D011336:Probability; D014463:Ultrasonography
D003281:Contraceptives, Postcoital