I gave my boyfriend oral sex a few days ago, i think i might have has some semen on my hand, then i went home and masturbated. Fortunately, sperm have a very short half-life and do not do well under dessicated conditions i. While there are plenty of urban legends talking about becoming pregnant from dried semen, there is no truth to these kind of stories. Sperm can live for days in warm, moist conditions such as the vagina. However, once dried sperm will die within a matter of minutes. If you had wiped the semen from your hand onto your vagina immediately after its ejaculation you would indeed be at risk for an unintended pregnancy.
The length of time they stay alive has a lot to do with environmental factors and how fast they dry up. If you ovulate shortly after you finish your period, the sperm may still be alive and can fertilize the egg. Learn more: Can you get pregnant if you have sex on your period? Keep reading to learn more about the lifespan of sperm as well as sperm motility. Also find out which urban legends about sperm and pregnancy are true and which are false.