Given the embarrassment of the alleged underage gymnasts, would a small male slipped in as a female have to go whole hog in live to maintain the mask, as you say, aardvark? If they just disappeared after the Olympics like so many East Germans did, it would be a giveaway to the press and Olympic organizers.

I can see an authoritarian govt with the acquiescence of a poor, patriotic family and the boy, female organs are implanted from a near perfect match -- hey there are a lot of people in China after all -- and all they need is a good match to an accident victim, or given the govt, a prisoner or even some poor teenager they could convince to do her patriotic duty. Another variant would be his girlfriend is the match and they swap bits for their country.

They have many excellent scientists and are engaged in massive espionage World wide. Likely they could discover a technique to alter her genes so she really is a female version of herself, maybe even with a few performance enhancing tweaks. Maybe like in the serial here, Acidalia, the virus used to transport the new genes gets loose and much of the world becomes female and very athletic.

Oh no, Planet of the Amazons!

John in Wauwatosa

P.S. There would have to be a limiting factor, maybe supceptablity is based on blood type or some other genetic componet.