So confused. After 3 days of "low fertility" results on the clear blue OPK, I got a Peak. The first response OPK test looks negative though. This is the 2nd cycle in a row that this has happened. I'm on CD 10. Do you ladies trust one brand over another?

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Answer

The digitals create a baseline of your LH levels to more accurately determine your fertile window. If it's the CBE Advance opk, then it's not just reading LH, but also estrogen.

First Response just picks the LH and will turn positive when the LH is greater than or equal to whatever number they think is the average surge (for most opks it's 25).

I'd go with the digital. You probably just have had rapid hormone changes, instead of a gradual switch. It happens and it's perfectly okay.

Just keep BD'ing until your fertile signs disappear to cover your bases.

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My fertility doctor had me using the clear blue... it's more accurate to your levels. Mine would be the same.... 3 days low then I would have my peak day.

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This happened to me a few months ago. I tested with the first response OPK again the next morning and it showed a positive. Keep testing and BD to be on the safe side!

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Any advice is appreciated!

So confused. After 3 days of "low fertility" results on the clear blue OPK, I got a Peak. The first response OPK test looks negative though. This is the 2nd cycle in a row that this has happened. I'm on CD 10. Do you ladies trust one brand over another?

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