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Originally Posted by Zenja
In what context are the ARP statistics? If something is 97% effective, does that mean I have a 3% chance of making her pregnant every time we have sex, every year, or during the entire time used? There's a big difference. That 3% compounded 10 times becomes 26%.

ARP is for the year.

Typical use of the pill = 5% ARP - so of every 100 couples using the pill only, 5 will become pregnant in the course of the year.
Old 12-10-2004, 12:55 AM Arjuna is offline  
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