Father will be reunited with baby adopted without his knowledge, judge rules

[TheMadMonk]

57. My number comes from a genetic survey conducted in QLD,...

...Australia some years ago. IIRC, they were chasing something completely unrelated to paternity, and someone noticed that there was a large number of siblings who didn't share a father. Count and divide by the sample size, 25% was the number that popped out.

There may have been a sampling bias towards the lower end of the socio-ecconomic scale, but since that's also where most kids are adopted from it's probably a wash.

1 in 4 or 1 in 10, it's still potentially an issue. And it's already been muddied, by judges deciding that even in cases of deliberate, proven fraud on the part of his wife, a cuckolded husband has ZERO chance of recovering any maintenance he paid for children not his. AND other judges, deciding that a man can be held liable for 10 years back support plus interest, on a child he never even knew existed.