Hello Benam, while we are certain that our first parents had other children (besides Cain, Able and Seth) .. e.g.
Genesis 5:4, it seems to me that if they had children prior to the Fall/prior to Cain, it would have, at the very least, warranted a passing reference in the Holy Writ.
The other thing is, they would have been born without a fallen nature, as would their entire progeny, so were are their immortal/sinless children living today (unless they fell into sin as well, separately from Adam and Eve?). As far as we know however, "
nobody's perfect" remains our race's most common saying, because ALL of us are sinners.
There is plenty of evidence that our first parents existed and that they did what the Bible said they did, but there is no evidence whatsoever that babies were born to our progenitors prior to the fall,is there
Thanks!
--David