Progesterone in luteal phase confusing blood test questions?
Hi! For various NHS admin mistake reasons, I have had my progesterone tested two days in a row, neither of which are 7 DPO (I have to have regular monitoring blood tests for an unrelated health condition I have, and for some reason the hormone ones were attached to these despite wrong timing – & another admin error meant I had to repeat them the next day). By my calculation, these were done on 4 DPO and 5 DPO, though there is a possibility its 5DPO and 6DPO. However, the results show my progesterone trending down, when my understanding is it should be rising to peak mid luteal phase (eg 7DPO):
- 4 DPO (taken morning ~9am): 25 nmol/L
- 5 DPO (taken afternoon ~3pm): 19.1 nmol/L (I think this converts to 6 ng/mL)
When I saw the first test result, I was pretty pleased as I had been worried I might be having anovulatory cycles, and while the lab result guidance says >30 nmol/L indicates ovulation has occurred, I think I just assumed that given it was early, it would continue to rise to hit its peak in a few days, and that 25 was close enough to 30 to suggest that this would happen, particularly as the test was done earlier than they're meant to be. However, the fact it's dropped LOWER the next day, rather than rising or even staying around the same, has me worried and confused. Does this mean it's likely I didn't ovulate?
Obv, I wouldn't really have asked for these blood tests at this point in my cycle, or twice in two days, but as I say it happened because of a string of frustrating admin areas, and now I have the numbers I keep trying to work out what they mean!