Individuals with five alpha reductase deficiency who are assigned female at birth may develop male musculature due to normal testosterone levels but lack facial hair and other male-typical body hair due to the absence of DHT.

“So the the ones that really do appear to be female and can even be uh yeah people may believe that they're female until puberty when they start developing male musculature >> uh >> because then they're producing totally normal testosterone levels. Yes. Just not DHT. >> That's right. >> Which Yeah. The testosterone at this point is the determining factor. >> Um determining what? >> Muscle mass, body hair, things like that. Well, it can. If you don't make DHT, some body hair will won't be produced. You won't have full uh male typical levels. You certainly won't have any facial hair. >> You won't have uh male generally, I don't think you have male pattern baldness.”