The Ultimate Survival of the Fittest - 250 Million Start the Race, All Will Die but One

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Sperm go on the most amazing journey, one we take for granted. From the moment sperm leaves the male body, the vagina does everything it can to try and kill it.

Over 1000 sperm roll off the production line every heartbeat and 250 million leave the male body at ejaculation. It's a big race with only one penetrating the egg.

See how the race of the winning sperm unfolds below in our infographic.

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250 million attempt the journey, but only one will make it...

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<div style="clear:both"><a href=""><img src="https://www.ovulationcalculator.com" title="The Journey of the Winning Sperm" alt="The Journey of the Winning Sperm" border="0" /></a></div><div>Courtesy of: <a href="">Ovulation Calculator</a></div>

Allan Pacey BSc, PhD, FRCOG

By Professor Allan Pacey BSc, PhD, FRCOG - University of Sheffield

Read the full story: The Journey Of Sperm by Professor Allan Pacey.

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  1. Anurika Sep 29, 2016
    What if you use the ladies room after ejaculation? Will it reduce the amount of sperm left or everything flushes away?
    1. Christina (OC Team): This shouldn't be an issue. Everything doesn't flush away when you use the restroom. - (Sep 29, 2016)
    2. Sunday: I was thinking the same question. What about standing up? I read something about gravity and not allowing sperm to travel???? - (Oct 05, 2016)
    3. Christina (OC Team): You can lay down with your feet up after sex if you're worried about gravity. But you can still get pregnant if you stand up. :) - (Oct 06, 2016)
    4. Sunday: Thanks - (Oct 06, 2016)
  2. Joy Oct 05, 2016
    After sex, does douching interfere with the process by reducing the number of sperm cells that enters the cervix?
    1. Christina (OC Team): Douching is definitely not a reliable form of birth control, but it's also not recommended for TTC because it isn't sperm-friendly. - (Oct 05, 2016)
  3. Ernelle Oct 21, 2016
    Just took a pregnancy test. It was negative.
  4. Kris Oct 24, 2016
    I am wondering if there will be a chance that sperm is still here inside. We tried to conceive yesterday, but my ovulation day is at 29. Do we have a chance? My dh is working and will get back home next month, so we're having a hard time to get good timing.
    1. Christina (OC Team): Sperm can live in the body for five days. Good luck! - (Oct 25, 2016)
  5. Tianathompson Jan 20, 2017
    For four years, I have not been pregnant.

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