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TTC OPK help

Faye • Fri, Nov 06

Hi, this month I used clear blue dual hormone OPK and got my peak on CD 19 after 1 day flashing smiley, took Cheap OPK same day as peak on clear blue but it was negative... The. Cheap opks finally showed positive CD 21. Has anyone else experienced this? Does this mean I ovulated on CD21 as CD22 was negative again.

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