If used consistently and correctly, which of the barrier methods of contraception has the lowest failure rate?
1. Spermicides
2. Female condoms
3. Male condoms
4. Diaphragms
3
1. Incorrect. Spermicide failure rates vary from 20% to 50%. If used correctly, failure rates for male condoms are only 3% to 5%.
2. Incorrect. Female condom failure rates are about 21%. If used correctly, failure rates for male condoms are only 3% to 5%.
3. Correct. Although "typical users" might have failure rates of up to 15%, if used correctly, failure rates for male condoms are only 3% to 5%.
4. Incorrect. Diaphragms with spermicides fail at a 16% rate. If male condoms are used correctly, failure rate is only 3% to 5%.
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