How quick does "use it or lose it" set in?

I took Step 1 early June of this year (2020), and today my attending pimped me on Prader Willi/Fragile X syndrome and I was like ".....whaaaat? What is genetic dizordurzz". I literally remembered nothing. Is it normal to lose the Step 1 details this quickly? I did fine on Step, but it appears to be a cram-and-dump type exam.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Medical Students - MD Source Type: forums