Comment by rpcope1

It's probably going to take way more than just free daycare to make a dent. If declining birthrates can be swung back to a more neutral rate like 2.1, it probably will mean wide reaching financial, cultural, and general societal changes. I think something like the Order of Maternal Glory (https://en.wikipedia.org/wiki/Order_of_Maternal_Glory) but for like 3+ kids, where there's additional social standing in addition to significant financial support, would be a good start.