A multicenter, randomized study of an extended cycle oral contraceptive.

@article{Anderson2003AMR,
  title={A multicenter, randomized study of an extended cycle oral contraceptive.},
  author={Freedolph D Anderson and Howard I. Hait},
  journal={Contraception},
  year={2003},
  volume={68 2},
  pages={89-96}
}
OBJECTIVE To assess the efficacy and safety of Seasonale, 91-day extended cycle oral contraceptive (OC). METHODS A parallel, randomized, multicenter open-label, 1-year study of the OC Seasonale [30 microg ethinyl estradiol (EE)/150 microg levonorgestrel (LNG), and Nordette-28 (30 microg EE/150 microg LNG)] in sexually active, adult women (18-40 years) of childbearing potential. Patients received either four 91-day cycles of extended cycle regimen OC, or 13 cycles of the conventional 28-day OC… CONTINUE READING