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https://doi.org/10.1016/S0010-7824(00)00095-0
Title: | Prolonged effectiveness of Norplant® capsule implants: A 7-year study | Authors: | Sivin, I. Schechter, J. Mishell, Jr. D.R. Diaz, S. Pavez, M. Biswas, A. Alvarez, F. Brache, V. Darney, P. Holma, P. Wan, L. Kiriwat, O. Abdalla, K. Campodonico, I. Pasquale, S. |
Keywords: | Accidental pregnancy rates Body weight and unintended pregnancy Capsule implants Contraception Duration of use Effectiveness Implants Levonorgestrel implants Long-term effectiveness Norplant® Soft tubing implants |
Issue Date: | 2000 | Citation: | Sivin, I., Schechter, J., Mishell, Jr. D.R., Diaz, S., Pavez, M., Biswas, A., Alvarez, F., Brache, V., Darney, P., Holma, P., Wan, L., Kiriwat, O., Abdalla, K., Campodonico, I., Pasquale, S. (2000). Prolonged effectiveness of Norplant® capsule implants: A 7-year study. Contraception 61 (3) : 187-194. ScholarBank@NUS Repository. https://doi.org/10.1016/S0010-7824(00)00095-0 | Abstract: | Soft tubing Norplant® contraceptive implants were studied in 1210 women for 7 years to measure the duration of effectiveness and the magnitude of the pregnancy rates over that time. Mean age at enrollment was 27.4 years. Of the enrollees, 42% were US residents. One-sixth (16.1%) weighed ≥70 kg at the time of implant placement. At the end of 5 years, the cumulative pregnancy rate was 1.1/100; at the end of 7 years, it was 1.9/100. No pregnancies occurred to any of the 400 women who enrolled in the study at age ≥30 years and who weighed <100 kg. Among women aged 18-33 years, the 7-year Norplant pregnancy rates are comparable to the median pregnancy rates of tubal sterilization methods for women of the same age and duration of use. For women aged ≥34 years, without regard to weight at admission, the 7-year effectiveness of soft tubing Norplant equals or surpasses that of tubal sterilization. For continuing implant users, annual pregnancy rates <1.0/100 in years 6 and 7, together with low cumulative pregnancy rates, testify that Norplant capsule implants remain highly effective for 7 years. Copyright (C) 2000 Elsevier Science Inc. | Source Title: | Contraception | URI: | http://scholarbank.nus.edu.sg/handle/10635/37099 | ISSN: | 00107824 | DOI: | 10.1016/S0010-7824(00)00095-0 |
Appears in Collections: | Staff Publications |
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