It doesn't appear that pre-ejaculate is the issue...
...but rather sperm that is in the actual ejaculate can be reintroduced to the vagina if penetration continues after withdrawal and ejaculation. Looks like this article covers it pretty well.
There is still sperm in the pre-ejaculate, just not as much. But definitely enough to still get pregnant!! Never use the 'pull out' method as protection!!
Oh hmm... thanks for sharing, Tish.. like the others said, still not fool proof ;)
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Born: Homestead, Pennsylvania
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On Moms.com since: Dec 17, 2013
Working mom of two, happily married, editor/content manager of scientific publications for a scholarly society in Washington DC, attached parent, extended nurser. Parenting and loving the best way I know how!