11/01/1979 - " The rate of breakthrough bleeding associated with Ovral use in the 1st 3 cycles (16.6%) was significantly (P .05) lower than that associated with using either Norinyl or Norlestrin (46% and 51.7%, respectively). "
05/26/1977 - "A double-blind crossover study of 480 women taking either Ovral, Norinyl, or Norlestrin was conducted to determine the effects of missing 1 contraceptive tablet in the pill sequence on the incidence of breakthrough bleeding. "
|2.||Low Vision (Subnormal Vision)
|1.||Ethinyl Estradiol-Norgestrel Combination (Ovral)
|2.||Norinyl (Ortho Novum)