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How to calculate dpo?

So I got a LH surge registered on Dec 10 on my opk. Does this mean Dec 11th is 1 dpo?

3 Answers • 9 years ago


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If you are just using OPKs and not temping I would count the day after a positive OPK as ovulation day. So Dec 11 would be O day, and Dec 12 would be 1 DPO. Without temping, that is still basically a guess, but an educated guess. GL!

9 years ago


So still early days ie 10 dpo for testing.!

9 years ago • Post starter


It could be . . I have found OPK's not too be that accurate , they will say I am at peak fertility, but I won't actually ovulate until 5 days later. I have used two different brands, Wondfo and Clear Blue and both have surged several days before I actually O'd . . I tend to go by temperature to confirm ovulation. Good luck to you and fingers X!

9 years ago


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