TABLE 3. Contraceptive efficacy of diaphragms.
Date | Country | No. Women |
12 Month Pregnancy Rate (Life Table or Pearl Rates) (%) |
1973 | USA | 1186 | 23.0 |
1976 | USA | 2168 | 1.9 - 2.2 |
1982 | USA | 368 | 18.6 |
1982 | UK | 4217 | 1.9 |
1983 | USA | 721 | 12.5 (randomized trial with sponge) |
1989 | Israel* | 85 | 3.2 |
* 24 month rates; "highly motivated women"