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Bbt help please

Dianna • Wed, Oct 30

I don't understand BBT but FF is saying i ovulated on cd12 and flo is saying cd14. Previously when test LH its always been cd13-16 for ovulation. I didnt BD until cd13 and i don't know which chart to go by? Usually they match if FF is accurate i am 100% out if flo is right i still have a chance but idk how to read these things. I also still have ewcm. Bbt