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A Four-Year Clinical Study of NORPLANT Implants
Irving Sivin, Soledad Diaz, Pentti Holma, Francisco Alvarez-Sanchez and Dale N. Robertson
Studies in Family Planning
Vol. 14, No. 6/7 (Jun. - Jul., 1983), pp. 184-191
Published by: Population Council
Stable URL: http://www.jstor.org/stable/1965499
Page Count: 8
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A total of 324 women aged 18-35 began use of NORPLANT subdermal implants in Finland, Chile and the Dominican Republic in 1978-79. Through four years of first-segment use, the average annual continuation rate was 84 per 100 women and the four-year cumulative rate was 49 per 100. There were no pregnancies in the first 2.5 years of use, and a total of two by the end of four years. Single decrement (gross) pregnancy rates cumulated to 1.2 per 100 users at the end of month 48, and the Pearl index through four years was 0.2 per 100 woman-years. The NORPLANT system is thus seen to combine acceptability as measured by continuation with long-term effectiveness
Studies in Family Planning © 1983 Population Council