This site ranks IVF clinics:
They seem to use some combined index based on implantation rate (Quality Score), the number of transferred embryos (Safety Score), and how consistent the clinic has been in recent years (Consistency Score). I’m not precisely sure what the “SART Score” is, but I think it’s probably based on live birth per started cycle.
It seems their idea is to not reward clinics for transferring many embryos to increase success rates. Hence they use implantation rate instead of birth rate, while their safety score penalizes clinics that transfer more embryos.
It’s almost certainly based on SART data. Clinics that don’t report are not shown.
I think it must be pretty new. I have not seen it mentioned before.