"Ok so i have heard after a man ejaculates some sperm is left in the penis and in the vas deferens. then a man can urinate flushing out all the semen? or does urinating not exspell all sperm. and then is there a chance of pregnancy from whatever was left after urinating?"

Urinating after wards can help lessen the odds of pregnancy, but I wouldn't count on it as birth control. Anytime there has been a recent ejaculation, and then reentry, the chance of pregnancy increases. This is one of the main reasons people find the withdrawal method fails.

OK I need to explain the situation. At ten in the morning I masturbated. Then I showered and peed. Then at least once more in the day I peed. Then at ten at night me and my girlfriend fooled around. Is it possible my precum contained semen?

So after peeing at least twice and a twelve hour difference could my precum could have contained semen?

Of course, if it was a few minutes after you used the bathroom, but after 12 hours, there will be sperm,
There is some sperm even after a few min, just not as many.

Yes, it's possible your fluids contained pre-ejaculate.

Please use REAL birth control if you aren't ready to be a parent.

You make no sense you said it woukd and wouldn't contain semen.

Do you even know anything on the subject? Because the liquid is the precum.. what I'm aking is after urinating twice and twelve hours would there be sperm in the precum.

Precum doesn't contain sperm. It can pick it up from a previous ejaculation. But I've heard that peeing flushes is out

Do I know anything on the subject? HAHAHAHA!

I deliver babies for a living. I think I know a little bit about how that happens!

Pre-ejaculate does indeed contain sperm.

Quote:

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Yes. Pre-ejaculation fluid may contain sperm, which means that a woman can get pregnant even when ejaculation doesn't occur within the vagina.

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Found here... Birth control: Can pre-ejaculation fluid cause pregnancy? - MayoClinic.com

OK I know that it can contain sperm. However I have read in multiple new studies that pre ejaculate fluid created in the cowpers gland itsellf does not contain any. It can pick up semen in the urethra from a former ejaculation.

Found here... http://www.healthboards.com/boards/archive/index.php/t-90090.html

That article was from April 2003.

The one I provided was from the MAYO Clinic 2009. The Mayo Clinic is a very reputable medical facility.

True but yours also says it may contain sperm, not that it does.

True, mine does say that. So, rather than playing with fire, why not be safe?

Yes I understand and I am planning on being safe. I just am curious to know if precum does for sure contain it or does it pick it up from a previous ejaculation

It appears, from the Mayo Clinic study, that it has been found in 41% of the men that it did. Apparently there are not more definitive studies at this time.

So, it's wise to play it safe.

Can you put up where you found that?

It's the link I quoted above.

Oh, and please don't use the comments feature to follow up. Just scroll down further to the Answer box.