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Ovulation Predictor Kits (OPK)

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Updated May 16, 2014

Definition: Ovulation predictor kits detect a surge of the hormone LH, which peaks 24 to 48 hours prior to ovulation. Sometimes abbreviated as OPK, ovulation predictor kits require you to urinate on a stick every morning, for the week before you expect to ovulate.

More on detecting ovulation:

Also Known As: OPK, ovulation predictor

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