Blood experiment to check for low progesterone levels on compact disc 22?

Does anyone know why they specifically test on Day 22 of my cycle for a progesterone lesser amount?

I did tell my doctor that I ovulate late (CD17/18) and my luteal phase is on the short side (10 days) so perchance I should get tested latter but he said it was standard to examination on CD22.

Just how critical is this? because my CD22 falls on a Sunday (typical) so do I lie and progress get tested on Monday (CD23) but only just say it's CD22 or step on the Friday?

Actually, technically speaking my period started on a Saturday hours of darkness just beforehand midnight so do I count Saturday as CD1 or Monday as CD1 or does it really matter?

Thanks!
Answers:

Mid cycle bleeding after have sex for nearly 2 weeks?

why would you lie? Why not discuss this beside your doctor.

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