Can a woman get pregnant from pre-cum?

Q: ​Can a woman get pregnant from pre-cum?

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A: While the most commonly cited answer for this question on the internet is "Yes," it turns out that the idea a woman can get pregnant from pre-ejaculate (pre-cum) is somewhat of a myth.  Pre-ejaculate actually comes from the Cowper's gland (which is located just behind the penis) and normally contains no sperm.  The fluid is just meant to clean out the urethra and vagina, so that sperm aren't harmed by any of the acidic fluids that are usually in those areas.  But, scientists used to believe that this fluid sometimes contains sperm too.  We now know that it doesn't.

This myth originated from studies where men produced pre-ejaculate and ejaculate multiple times in quick succession.  They did this in order to produce enough fluids to be analyzed in a lab.  When this is done, sperm can be left in the urethra from the last ejaculation and then the pre-ejaculate can push some of it out, making it look like pre-ejaculate contains sperm.  However, unless a man has very recently ejaculated, pre-ejaculate contains no sperm at all.  So, women really don't need to worry about getting pregnant from pre-ejaculate, unless their male sex partner has very recently ejaculated.

Source:
https://www.ncbi.nlm.nih.gov/pubmed/12286905
​https://www.ncbi.nlm.nih.gov/pubmed/12762415 
http://americanpregnancy.org/getting-pregnant/can-you-get-pregnant-with-precum/

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