Got my blood results for "Day 21" progesterone to confirm ovulation but I was actually out of the country on CD21 so had to do it early - CD18. Didn't think it'd be too much of a problem because my cycles are short-ish, 26/27 days so CD18 would be close enough to 7 days after ovulation (more like 5-6).
But my results seem to be very high: 87nmol/L whereas the normal range for luteral phase seems to be up to 60nmol/L.
Can progesterone being too high make it difficult to conceive? Got scanned very recently so unlikely to be ovarian cysts or cancel as Dr Google suggests.