First Response Early Result takes the cake detecting as little as 6.3 mIU/mL. I've seen faint positives as early as 8 DPO with these! Now, the new curved ones, people have complained, including myself, that can cause false positives because the new indents. If you can, I would try to get the old style ones! I added a pic.

I even found something close to FRER & cheaper! SurePredict HCG strips can detect 10mIU. I bought 25 for $14.99, good deal. I added a pic with them compared to a FRER, & they both show faint lines. So I'd say it works almost as good as them!

Then, there is Easy@Home or Wondfo brand, it can detect 25mIU.

ClearBlue Plus detects 25mIU as well.

I'm gonna post the rest of the pregnancy tests below. Even digitals, but most of us know we don't use digitals for early testing as they range from 40+ mIU. I'm sure this will help a lot of you as some of us never know which are the best for early testing. I would recommend FRER if you have the money, but if not go with SurePredict or Wondfo brand! ClearBlue plus is very accurate but detects the same as Wondfo but much more expensive!