So i guess the next question is: did the mice have different sperm characteristics because they were stressed? Or was it a long term change? By which I mean,

So i guess the next question is: did the mice have different sperm characteristics because they were stressed? Or was it a long term change? By which I mean, if the stressed mice were allowed to recover and have happy lives for a few months after the stress period, before mating, would these results still occur? Because if not, then it opens the possibility that just being incredibly stressed out altered the production of sperm in some temporal manner.