Never: Pregnancy can occur at any time in the menstrual cycle, as well as more than one ovulation at different times in the same cycle.(fraternal twins). That's why the rhythm method is not a 'secure' contraceptive method.
Answered 8/27/2013
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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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