99.9% sure it does not, but If it does, it would make no difference. Your body would produce more to go back to normal within a day and if your on testosterone then your next shot would bring it back to normal. Your testosterone levels rise and fall every day so I wouldn't be concerned even if there was a possibility
So I asked my uncles dr. Who's one of his friends I didn't actually go to ask the question.
But I said, "stupid question but could donating blood temporarily lower your testosterone?" He looked me dead in the eye, paused and then said, Wow that really is a stupid question . No it dosent, but why the hell would you care if your testosterone dipped for a few hours or even a day. So I gotta go with the dr. On this one.
Then he said that drinking till your drunk can lower your testosterone for like 3-7 days depending on how far you take it. I said ya well I quit a year and a half ago. He said ya but it sounds like a question someone would ask me when there drunk.
So I will not be asking him any more questions like that