Abstract
The Cooperative Statistical Program for the Evaluation of Intrauterine Devices (CSP), sponsored by the Population Council, continued its trials of “second generation” IUDs over the past year. This report presents net cumulative event rates by type of termination, closure rates, and continuation rates per 100 users to the end of the second year from the first insertion for the Shell loop and 1-year rates for a new modification, the Shell loop with 2% gum silicone added (Table 3.1). The data on the Shell loop originated with three investigators; those on the Shell-silicone loop with seven investigators.
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References
Tietze C, Lewit S. Evaluation of intrauterine devices: ninth progress report of the Cooperative Statistical Program. Studies in Family Planning 1970;55:1–40.
Tietze C. New intrauterine devices: a research report. Studies in Family Planning 1969;47:14–15.
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© 1987 Sarah L. Tietze
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Tietze, S.L., Lincoln, R. (1987). Polypropylene Loops: A Research Report. In: Tietze, S.L., Lincoln, R. (eds) Fertility Regulation and the Public Health. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-4702-9_4
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DOI: https://doi.org/10.1007/978-1-4612-4702-9_4
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-9121-3
Online ISBN: 978-1-4612-4702-9
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