Does an OPK have a time limit like an HPT?

HPT limit OPK time
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Does an OPK have a time limit like an HPT?

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Kind of. There is a time limit on OPK’s (as they are, like HPT’s, a “rapid assay diagnostic”) but it is not as strict or consistent as the 10-minute across-the-board HPT rule. Read the instructions that came with your OPK’s to see the recommended limit for that particular test, as they can be quite different.

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