You are not supposed to use spermicide alone. You are supposed to use it with a female condom. If women always use spermicide as directed, 15 out of 100 will become pregnant each year.

I'm not going to argue it any further, as everything I've learned I've learned from the article above and the planned parenthood article. Why argue about it if you're not stating any facts. The point I'm trying to make is to read the directions.

Spermicide Effectiveness - Spermicides