7% pill/29% spermici: Effectiveness with contraception is reported as either the lowest expected rate (l) ( with motivated patients who are reminded - in a clinical trial, for ex.) or the typical rate (t)- seen in a general sampling of the community - at random. The pill ranges from 0.3% (l) to 8% (t) and spermicide ranges from 18% (l) to 29% (t). Hope this helps.
Answered 7/7/2012
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