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i sent a post last night about this also, but was hoping for more answers, so thought i would try again.
im only asking because i have been DNA tested against my ex’s baby and the results are due, but im not able to sleep or anything thinking about this..
ill quickly just tell you the basics
1. we slept together around the time she conceived (my ex)
2. the dates have a 2 week each way ‘possibility’ (as with any pregnancy)
3. she was sleeping with other people
4. i didnt reach full orgasm (at all)

now the info im posting below is from a .gov site, and i wondered if anyone knows if its been ammended or anything, i know there are alot of opinions about this but like i said im not sleeping thinking about this,

im trying to establish if there is chance it could be my baby, as i am really not ready for this kind of shock, it may seem selfish, but i believe a child should have both a mother and father around it everyday,

so the research : – (and i mention again, from a .gov site)

Below are 3 research studies Where scientists prove there is no sperm in pre-ejaculate fluid- (Once again this does not mean that you 100% can’t get pregnant).

Study 1

PIP: A study in Boston, Massachusetts, and another study in New York City examined samples of pre ejaculate fluid from HIV seropositive and HIV seronegative men to determine whether HIV was or was not present in pre ejaculate fluid. The researchers found macrophages and CD4 lymphocytes in most samples, indicating that HIV was present. The more significant finding, however, was that most pre ejaculate samples did not contain any sperm and those that did had only small clumps of a very small amount of sperm which seemed to be immobile. A larger study is needed to verify these results. If these results are confirmed, they may dispel the myth that pre ejaculate fluid contains sperm. An ongoing WHO/USAID study shows that the pregnancy rate caused by men with 3 million sperm/ml/ejaculation is very low; fertility clinics consider men with a sperm count of no more than 5 million/ml to be infertile, particularly if is there is low motility. The average ejaculation has about 100 million sperm/ml, but about 10 million sperm pass through the cervical mucus, about 1 million make it to the top of the uterine tract, and just about 100,000 sperm reach the fallopian tubes. Thus, only a couple of sperm, assuming motility, would reach the fallopian tubes in the case of the pre ejaculate samples with some sperm, which tended to be immobile (sperm levels only in the 1000s). Thus, the probability of pregnancy is very love if pre-ejaculate fluid enters the vagina. Pre-ejaculate fluid of 6 of the 9 HIV seropositive donors in Boston and 6 of the 14 HIV seropositive donors in New York contained HIV, regardless of symptom status or antiretroviral therapy status. Thus, the risk of HIV transmission may be higher than unplanned pregnancy, so people should use condoms before the penis enters the vagina, mouth, or anus. -PMID: 12286905 [PubMed - indexed for MEDLINE] .

Study 2

Journal of Assisted Reproduction Genetics, 2003 Apr;20(4):157-9. Zukerman asked "Does preejaculatory penile secretion originating from Cowper’s gland contain sperm?" – conclusion: "Preejaculatory fluid secreted at the tip of the urethra from Cowper’s gland during sexual stimulation did not contain sperm and therefore cannot be responsible for pregnancies during coitus interruptus."

Studies 3 and 4

Here’s another two studies that were studying the HIV viral load in pre-ejaculate and incidentally showed that there isn’t sperm:

Ilaria G, Jacobs JL, Polsky B, Koll B, Baron P, MacLow C, Armstrong D, Schlegel PN. Detection of HIV-1 DNA sequences in pre-ejaculatory fluid. Lancet 1992;340:1469.

Pudney J, Oneta M, Mayer K, Seage G, Anderson D. Pre-ejaculatory fluid as potential vector for sexual transmission of HIV-1. Lancet 1992;340:1470.

What these scientific findings suggest is that precum either does NOT contain sperm AT ALL, or that there is so little that the chances of pregnancy are very VERY low. The chances are not eliminated but they are so low that becoming pregnant from pre-*** easily becomes urban myth.

thankyou for any information you may have, its greatly appreciated

It’s possible, but not likely.

Pre-cum or pre-ejaculatory fluid is released when a guy gets an erection. It cleans out the inside of the urethra, which is the tube that carries semen and urine out of the penis.

The fluid makes the urethra less acidic and gives the sperm a better shot at surviving the trip from the guy’s testicles to the girl’s fallopian tubes. There’s usually NO sperm in pre-cum fluid.

But, if there are live sperm inside a guy’s urethra (because he has ejaculated recently), the pre-cum can "pick up" the leftover sperm on its way through the urethra and out of the penis. If a guy pees after he ejaculates, that would kill leftover sperm.

So, say a guy has sex and cums at 9 p.m. He doesn’t go to the bathroom after he has sex. At 10 p.m., he gets another erection and pre-cum fluid is released. That can have live sperm in it. Is it enough sperm to get a girl pregnant? Possible, but not probable.

But pre-cum can carry sexually transmitted diseases, so a guy should put on a condom as soon as he gets an erection.

hope that helps and think carefully about who you sleep with because id hate to have a mother who has no prorogative my little girl is 3 im only 18 and i know i can safely say who her father is and that i will set a good influence for heer when shes older
find the right girl and good luck