How long does a sperm stay alive in the external environment if released

Question: How long does a sperm stay alive in the external environment if released
- Keywords:
  sperm
Asked by YVEE to Ivy, Daniel, Christina, Cheryl on 25 Jan 2017.
- Christina Obiero answered on 25 Jan 2017:
  
  Hi Yvee!
  First and foremost, sperms are released within the seminal fluid which needs to be in the right volume (1.5 to 5 mL) and pH (7.05-7.8) and contain optimal nutrients (fructose), enzymes, proteins and other substances necessary for survival of sperms.
  If released within the body of a female, sperms can stay alive for up to 3 – 5 days. This means that if released before a woman ovulates, the sperms can still fertilize the ova if ovulation occurs up to 5 days from the time of intercourse.
  If sperms are released in other environments e.g. on a dry surface, their survival period is shorter.

Question: How long does a sperm stay alive in the external environment if released