is it OK to do day 21 test after 10 days of O

Hi:

I have to do my day 21 test (progesterone level) check after 10-12 days of Ovulation and I was wondering if the result would still be accurate..

would that be too late?.I know they usually wanna test after 7 days of O ,but I will be in vacation and will not be able to perform the test earlier...

Thnx

[Elaine Brown, MD]

Hi!
Yes, it will probably be too late.  You might get away with 10 days, but 12 days is really pushing it.  Its probably better to wait until next cycle.
Good luck!
Dr B

[Clarerol]

Hi Elanie

I have irregular and heavy periods all my life and it is not usual for me to be a week or so late. This month I am 10 days and I know I am not pregnant as I have not had intercourse for several months. However, I had unprotected sex a few days ago (8th day of being late) as I am late and waiting for my period to begin I figured that my most fertile days were past. However, I am now wondering whether this is true or if I could still be able to get pregnant?

Thanks