When infertility is an issue, couples start looking for every possibility, down to a man’s choice of underwear and the temperature of their showers.
Underwear choice does not impact on sperm counts and motility for most men. Hot showers do damage sperm present in the system. We see this as reduced sperm numbers and motility. I tell all my patients to avoid heat “down there”.
The reason a man’s testicles are outside his body in the scrotum is to keep them several degrees cooler than his core body temperature. Trying to boil the testicles is not a good thing for fertility. This means no hot showers, hot saunas, jacuzzis or hot baths.
The damage he does today reduces his counts for 74 days-the time it takes to make fresh, healthy sperm. So even an occasional hot shower is enough to keep his numbers down. I suggest that he check at least one and possibly two to three complete semen analysis after three days of abstinence. Each should be 4 to 6 weeks apart at the least.