Sort of a complicated question, I'll try to ask. How was I born me and not another?

[EruptedCarcassBloat]

I think the question still remains though. Because there's so many possibilities of other people being born from the same mother, it seems improbable that you specifically were born from that mother, or anyone for that matter. That's not even to take into account the billions of years of evolution leading up to you being born. I just can't fathom how improbable my birth actually is.

I'll ask again.  Is your question simply about the possible genetic combinations of your parents (and further ancestors)?  Because that could be conceivably quantified (if not practically, since we don't have access to the genetics of more than a generation or two back).

Yes, the specific combination of genes that is now "you" is one out of a gargantuan amount of other possibilities.  The odds that your parents gave birth to your particular genome is very tiny.  Not sure what the use of knowing the specific odds would be though.

So you're saying that the chances of me existing, sitting on this computer right now, aware of my own existence and reasonable sure of your existence, is at an extremely small odds of happening? I think it's very good to know, because I think knowing how I got here would be very useful for putting things into perspective. I always thought if I had a clear picture of front to back of what my existence on this planet is, then maybe it would be less stressful to think about the fact that I exist. Take it from me, the fact that I exist on this planet, especially not born 200 years in the future when artificial super intelligence and travel to mars colonies is possible, and possibly the end of religion, is one of the most depressing things in my entire life. The fact that I was born into a body, which only exists once and then is no more, and I got such a small chance of even being born in the first place, sometimes just makes me want to lay down on the floor and let all the overwhelming thoughts of existence just flow through my head. Or alternatively just fall asleep and wake up not feeling such distress about existing. I'm basically asking this question because existing is intolerable for me sometimes.

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There actually could be a lot of other reasons for answering the question too, I think it's pretty equivocal. That's the reason for asking the question that I can think of right now though.