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- Feb 11, 2012
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Just to add that my OPKs have always said in the leaflet, and I've read online, not to test early in the morning as LH isn't produced until slightly later in the day, and therefore testing early you may get a false negative. I've always only tested once a day (usually around 4-5pm) and never missed an LH surge.
Best of luck!
Best of luck!