User blog comment:LurkerLordB/Real-Life People born after a POD/@comment-1375165-20120803044713/@comment-1375165-20120805234726

The probability that a child will be born with a congenital disorder is no more than 5% - cut it in two assuming 5% of births that would be of the same gender (since you're right, LLB, that there's an approximately 50% of a modified birth - i.e. one directly affected by the POD - that result in a different gender).

Therefore, 52.5% is the firm maximum probability that someone whose birth is directly affected by the POD will end up substantially different. This ignores the fact that 5% is a maximum general probability of a child being born with a disorder. Some parents will have an almost zero percent chance while others will have chances in the double digits. It's not unfair to say that someone whose parents gave birth to multiple normal children will give birth to many more normal children under slightly modified circumstances.

What this amounts to is that about half of all births under slight influences from a POD (i.e. still between the same parents) will result in a child that could never have the same impact as the OTL person (because they're the opposite gender).

And, of course, I'd like to reiterate what Fedelede and I already said, that persons whose births are outside the influences of the POD will not differ from OTL.