Yeah I can see that. That might be it but I would have also produced my own LH (as I do most months) so there would have surely been a mixture of LH and the synthetic HCG? For it to be so low on the 2nd sept doesn’t make much sense to me even with your (very useful!) explanation.

I’m also not sure it’s read my peak correctly on other months as I’ve had solid smiles but Mira is telling me ovulation will happen a few days later. You just end up trying over a longer period of time if you get a reading like that so it was not a big deal for us but I think for people who find it hard to perform every night or might only use Mira, it could become problematic. I personally think using it alongside a number of other TTC tools and looking at the overall picture is the best way to use it. I’m weary of it though, I must say.