"There is no way anyone could give you the odds on a pregnancy without an ejaculation as there are many variables involved. There could be a very small number of active sperm in your pre-ejaculate, but could those swim and fertilize and egg? Who knows. Did your partner ovulate, etc. There is no way to calculate this risk. Don't have unprotected sex, ever. Unless you want to conceive. The worrying and waiting is not worth the risk of taking a chance! If you know you ejaculated, then you might talk to your partner about emergency contraception. I am not recommending that here, just mentioning it as a very, very last resort. For more read about it."
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