DOI:
10.1055/s-00000072
Seminars in Reproductive Medicine
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References
Ahrendt HJ, Nisand I, Bastianelli C. et al.
Efficacy, acceptability and tolerability of the combined contraceptive ring, NuvaRing, compared with an oral contraceptive containing 30 microg of ethinyl estradiol and 3 mg of drospirenone
Contraception 2006; 74(6): 451-457
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