Best together: http://www.cdc.gov/reproductivehealth/unintendedpregnancy/pdf/contraceptive_methods_508.pdf Individually, the failure rate is pretty high, but used properly together it's probably around 5 pregnancies per 100 women per year.
Answered 5/31/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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