Roundabout 10%: On average, a fertile woman who has unprotected sex once during a fertile time in her cycle has about a 6 - 8% chance of becoming pregnant. This doesn't double with two episodes of sex but does go up a bit and eventually plateaus. If you're tracking ovulation and happen to have sex on just the right (or wrong) day, chances can be as high as 30% with a single encounter.
Answered 11/13/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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