Fig. 3From: Norethindrone is superior to combined oral contraceptive pills in short-term delay of menses and onset of breakthrough bleeding: a randomized trialIncidence of Vaginal Bleeding or Spotting on Therapy Comparison of patients treated with norethindrone 5 mg three times daily versus controls treated with combined oral contraceptive pills. Aggregate data from both studies shown. (n = 27, p < 0.002)Back to article page