Contraception · 1992 · 29 citations · 7 references
MedicineGynecologyFertilityReproductive HealthReproductive MedicineAssisted ReproductionAssisted Reproductive Technology RegulationHormonal ContraceptionImplant Effectiveness
7
International Experience with NORPLANT and NORPLANT-2 Contraceptives
Irving Sivin · Studies in Family Planning · 1988 · 237 citations
Medicine, Gynecology, Obstetrics +15
A Four-Year Clinical Study of NORPLANT Implants
Irving Sivin, Pentti Holma, Francisco Alvarez‐Sánchez et al. · Studies in Family Planning · 1983 · 82 citations
Medicine, Surgery, Contraception +11
A three-year clinical trial with levonorgestrel silastic implants
Contraception · 1979 · 38 citations
Medicine, Gynecology, Surgery +3