Contraception · 2003 · 131 citations · 3 references
MedicineGynecologyObstetricsContraceptionReproductive EndocrinologyReproductive MedicineContraceptive EfficacyContraceptive MethodsContraceptive UseFemale ContraceptionHormonal ContraceptionIntrauterine ContraceptionHormonal Intrauterine SystemsIntrauterine Contraceptive DevicesIntrauterine Device EffectivenessLevonorgestrel Intrauterine System TreatmentLevonorgestrel-releasing Intrauterine System
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