A lot of numbers are thrown out there about the lifespan of sperm but here's the scoop: sperm can live as little as a couple of hours or as long as five days after sex. Once inside the vagina, the lifespan of the sperm depends on the woman's vagina, uterus, and fallopian tubes. Without fertile cervical fluid, sperm won't survive longer than a few hours inside the vagina or uterus if they make it that far. Many sperm die off in the very acidic vaginal canal within the first 12 hours.
How Long Does Sperm Live Outside the Body? - Sexual Health | HealthCentral
You might have heard a lot of questions being asked about the links between hot tubs, male fertility and sperm production. I decided it would be a good idea to try to separate the facts from the fiction and I did a little bit of research into the subject. So is a hot tub safe for sperm? Hot tubs are not safe for sperm.
Doug Johnson. Semen can survive on a human's hand for around 20 minutes, but acid, soap, heat and water can kill them faster. It is possible to impregnate a woman if sperm are on the surface of your hands before digital penetration. Although the chance is infinitesimally small, pregnancy can occur if a single sperm cell is transferred from your hands to a woman's vagina. Killing sperm on your hands is simple, and they die within minutes if you don't do anything at all.
Sperm cells are some of the most sensitive cells in the body. In fact, sperm are so sensitive to heat that the testicles hang outside of the body to preserve sperm from less than ideal body temperature. Sperm thrive in lower temperatures. This means that even small sources of heat can start to add up and damage your sperm count. While the effects of electromagnetic radiation on sperm cells is still being studied, the effects of the heat will quickly fry your sperm.