I dette studie var der fra dag 9 til og med dag 21 op til 64% fald i dalkoncentrationen for etinyløstradiol og et fald på op til 60% i dalkoncentrationen for norethindron.
During days 9 through 21 in this study, there was as much as a 64% decrease in ethinyl estradiol trough concentrations and as much as a 60% decrease in norethindrone trough concentrations.