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. 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)
  2. Ernelle Oct 21, 2016
    Just took a pregnancy test. It was negative.
  3. 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)
  4. Tianathompson Jan 20, 2017
    For four years, I have not been pregnant.
  5. Tanjia Mar 03, 2017
    I am 26 years old and my husband 35 years old. I have been married for 1 year 5 months and I am trying for two months, but I am not convincing. When can I get pregnant?

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