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How is an OPK different from the Clearblue Fertility Monitor?

April 26, 2017clearblue different fertility monitor OPK

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How is an OPK different from the Clearblue Fertility Monitor?

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OPK’s measure only one hormone, luteinizing hormone (LH.) They are a yes/no diagnostic device (“qualitative”) and will tell you only if your LH is surging (which means ovulation may happen within 12-36 hours.