Thread: Condom effectiveness. scary!
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Old 02-28-2007, 12:21 PM  
ADL Colin
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Join Date: Feb 2001
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Quote:
Originally Posted by NinjaSteve View Post
What if you use condoms and birth control pills and spermicide
Assume:

1 year condom effectiveness: 98%
1 year birth control pill effectiveness: 98%
1 year spermicide effectivess: 74%

Then chance of pregnancy in a year would be: (2/100)*(2/100)*(26/100) = 1 in 9600. That's the way to go.
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