FRER I think? Digital is nice because you get a clear YES + or NO-. But tbh, I got positives with my cheapies pretty early (10dpiui), they were just faint. DH just wouldn't believe them.
******bfp mentioned******* there are 15 miu tests out there but I find them really unreliable. I think frer are great... I got my positive with a FRER at 4 days past 5 day ivf transfer (equivalent of 9dpo)
Re: Most sensitive pregnancy test?
Clear blue weeks estimator is actually 25 miu :-) I understand the confusion though- the way they word a lot of their studies is misleading https://www.accessdata.fda.gov/cdrh_docs/reviews/K112870.pdf