DOI: 10.1055/s-00000072

Seminars in Reproductive Medicine

References

Teichmann A, Emerich C, Greven D. et al.
Continuous, daily levonorgestrel/ethinyl estradiol vs. 21-day, cyclic levonorgestrel/ethinyl estradiol: efficacy, safety and bleeding in a randomized, open-label trial 
Contraception 2009; 80(6): 504-511  

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