Effectiveness of levonorgestrel emergency contraception given before or after ovulation—a pilot study
N Novikova, E Weisberg, FZ Stanczyk, HB Croxatto… - Contraception, 2007 - Elsevier
BACKGROUND: Although widely used, the mechanisms of action of the levonorgestrel
emergency contraceptive pill (LNG ECP) are still unclear. There are increasing data to
indicate that LNG is particularly effective as an ECP by interrupting follicular development
and ovulation. An important outstanding question is whether it has any effect on fertilization
or implantation. METHOD: Ninety-nine women participated; they were recruited at the time
they presented with a request for emergency contraception. All women took LNG 1.5 mg in a …
emergency contraceptive pill (LNG ECP) are still unclear. There are increasing data to
indicate that LNG is particularly effective as an ECP by interrupting follicular development
and ovulation. An important outstanding question is whether it has any effect on fertilization
or implantation. METHOD: Ninety-nine women participated; they were recruited at the time
they presented with a request for emergency contraception. All women took LNG 1.5 mg in a …