Roman children

[Cave Equum]

"John Boswell studied the phenomenon in his book 'The Kindness of Strangers', and comes to the conclusion that the Roman system continued to operate until the early point of the High Medieval period, when exposure dried to a trickle (probably because economic opportunity was better), and was then replaced by foundling homes."

I'll have to look that up because, as I understand it, the practice was forbidden in the 4th century AD. That it was forbidden does't mean though that it didn't happen any more.