can you provide more context from uworld QID 3912?
It’s just the 1st sentence of the explanation - UW Step 3 uses this same defintion, UpToDate says 12-13, several other sources also vary in saying 12-13
Amboss still says 13. Unless 12 is specifically tested, would just put Some sources say 12-13 in females with lack of secondary sex characteristics.
Agree w/ @thomas.holmes here, just make a short note in extra and 13 in the text works better w/ the mnemonic in extra