Morning-after pill doesn't dent pregnancy rate

If you've used the "Plan B" morning-after form of birth control, you're in a pretty large group right now. The morning after pill was rejected for OTC sale then approved as an OTC item recently -- and since, sales of the morning-after pill have done nothing but go up.

But it's not helping the overall pregnancy rate in the population, according to researchers. The morning after pill seems to work for individual women, though. Why aren't the numbers of pregnancies declining, then?

The researchers for this study stated that easy access to emergency contraception does not reduce unintended pregnancy rates. Are women not taking the pill as required or without counseling on how to properly use the product, then?