A member asked:

Opk vs body/temp. cd9 ovu pains,ewcm,hsow, temp drop -opk. cd13, creamy cm, hh, temphas been going up since cd11. but + opk. can the opk been wrong b4?

A doctor has provided 1 answer

Yes: OPKs just measure urinary luteinizing hormone. Once the level gets above a certain cut off the test turns positive and usually stays positive for a few days. If you don't ovulate every month the level may occur much earlier or later in the cycle or not at all. Don't forget the P in OPK stands for prediction, not guarenteed.

Answered 3/10/2015

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