A member asked:

What is the breakthrough ovulation rate when taking nortrel (norethindrone/ethynl estradiol 1/35) consistently and with perfect use?

A doctor has provided 1 answer

Very minimal: If you are very consistent taking the bcp the pg rate is only 1 to 2% at the very most. Of course if you are taking other meds or antibiotics the pill absorption is affected and increases the failure rate.

Answered 6/19/2015

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