I have more figures for England than Scotland.
Of the 1090 babies taken into care in 2004 aged under 1 month by 31/3/7 600 had been adopted and 190 returned to their parents.
Personally I expect Ben to be reunited with his parents relatively quickly, but even if that is not the case the pressure on the authorities is to return him to his parents. In England children are more likely to be adopted (particularly as a result of historic pressures, partially as a result of structural processes). A very high proportion (but not a majority) of those children then return to care as a result of a disrupted adoption.
I have a question about this particular aspect on Monday.