Here is Practical Explanation about Next Life, Purpose of Human Life,

[Joods]

So Your father existed before your birth. you cannot say that before your birth your father don,t exists.

so next question is how child will understand this thing that who is his real father ? cuz before his birth he/she never seen him. so would he will accept anyone else as his father ? or how child will understand this thing that who is his real father ?

what is your answer ?

That's right, my father existed before my birth.

I can't know for sure my father is my father without a DNA test. My mother either for that matter. It's possible that I'm adopted and they never told me. I accept that they're my real mother and father because it's likely and it doesn't cost me anything to do so, and even if they're not my real mother and father, they have been just like a mother and father to me.

And really, in the grand scheme of things, isn't that all that matters? They provided you with the nurturing and love you needed as a child. They were the ones present in your earliest memories, so it's only natural to assume your father is actually your father.