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Old 12-03-2008, 02:41 AM   #1
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how long does sperm stay alive in our body for

how long does sperm stay alive in our body for

 
Old 12-03-2008, 05:41 AM   #2
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Re: how long does sperm stay alive in our body for

Something like 5 days?

 
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Old 12-04-2008, 06:39 PM   #3
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Re: how long does sperm stay alive in our body for

Typically, just one or two days, but maybe three at the outside.

 
Old 12-07-2008, 02:34 PM   #4
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Re: how long does sperm stay alive in our body for

Most sperm is killed very quickly because the vagina is a hostile environment and the semen leaks out rather quickly. However sperm that actually enters the cervix can live up to 3 days. I believe 12 hours is really the most practical time consideration because it takes many sperm to fertilize an egg, one isn't nearly enough.

Last edited by orion; 12-07-2008 at 02:36 PM.

 
Old 12-08-2008, 07:07 AM   #5
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Re: how long does sperm stay alive in our body for

1 sperm + 1 egg = fertilization

Only takes one

 
Old 12-08-2008, 05:16 PM   #6
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Re: how long does sperm stay alive in our body for

Orion is correct. One lone sperm could not possibly make its way from the vagina to the egg. The vagina is a hostile place for sperm and the vast majority are killed before they even reach the cervix. The sperm clump to gether and the ones on the outside protect the lucky ones in the center. While only one sperm will ever penetrate the egg, it takes millions to enable that one to make it.

 
Old 12-09-2008, 03:40 AM   #7
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Re: how long does sperm stay alive in our body for

Quote:
Originally Posted by roseratlarge View Post
1 sperm + 1 egg = fertilization

Only takes one
It actually requires a minimum of 5 million sperm for a successful vaginal fertilization; the vast majority of which are killed within minutes of entering the vagina. The 5 million number comes from fertility experts who have observed that men with lower sperm counts are very rarely successful.

Even when the sperm meet the egg, it takes many of them working in concert to open the egg. They use an enzyme located in their heads to dissolve the egg protective wall, but one sperm doesn't have enough enzyme to do the job. Eventually the wall weakens and one sperm enters. Very quickly the wall changes so no other sperm can enter.

Last edited by orion; 12-09-2008 at 03:42 AM.

 
Old 12-09-2008, 09:27 AM   #8
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Re: how long does sperm stay alive in our body for

Quote:
Originally Posted by Magnetic View Post
Typically, just one or two days, but maybe three at the outside.
Actually, they can live inside the body for approximately 4 days. And much shorter outside of the body because there is no warmth or moisture to keep them alive.

Last edited by EllieFrog; 12-09-2008 at 09:29 AM.

 
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