text: does sperm stay alive after it hits the air an if so how long?   if i am not mistaken it can survive for up to 24 hours after ejaculation and longer if it is contained in an air-tight seal and refrigerated/frozen.  i've known people that have gotten pregnant from semen that has been left on their underpants with no intercourse.  those little buggers have a mission and they will find a way from noway to get to that egg.