Precum baby?

I know this is stupid since I was educated that yes there could be alive sperm in precum. But, due to the factor that one sperm normally (exclusion of multiples whom are fraternal) makes it to the egg. I have a question to whomever it has happened to did you get pregnant on precum? This thought has been swimming around in my head since my mom and dad said that basically all kids were precum babies. So has anyone gotten pregnant from precum.