Does the 21 day progesterone test even mean anything if you ovulate super early or late?

Question

I didnt get a +opk till cd21, how is this test helpful?

Answer

You need to tell your doctor how many days are in your cycle, 21 day test is for people who have an average 28 day cycle, I have a 35 day, so my doctor would take my blood on cycle day 29.

Does the 21 day progesterone test even mean anything if you ovulate super early or late?

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