And here are my thoughts on ICs, as well as OPK as HPT:
You can't see all of them, but this picture has ten dollar tree tests (all but two are positive) and three FRERs, all of those tests having nice line progression. There is one lone, blazing positive, wondfo OPK (that I took this morning having run out of dollar tree tests lol) and what I am holding is a an IC with a supposed 10mIu/mL sensitivity. It is not the first one I've taken- I actually took one every single time I used a dollar tree test- but this one, at 15dpo, is the darkest- and only the second- line I've gotten. They were straight up negative for quite some time. It may be a bad batch or something, but I'm not a fan.