I just read an article of such a case in France. I’ve also heard of other cases elsewhere. If it were to chas v’shalom happen to Jewish couple, what would be the halachic requirements of swapping the children back to the biological parents if a) both sets of parents agreed to do so or if b) one set of parents wanted to swap but the other wanted to keep the child they raised. Does it matter how long after the switch the error was recognized?
Is the halacha any different than regarding adopted children? What would the implications be if one couple was Jewish and the other not?
What are the obligations of kibud av v’eim of the child to his birth parents and to the parents that raised him? What would be the sociological implications?