Well, like switching from money to a communalist reputation economy, this would not be a readily accomplished transition on my world.
Oh, you just want to supplant the creches or supplement them, gotcha. Although they'd wind up not speaking the language and stuff.
Okay, but a ton of languages are spoken on my world; I know the one that's common to city-states in a certain region of the largest continent but there are dozens and dozens more. If the Valar can rescue all the babies as they appear I'm all for it but arranging that they're suitable to repatriate will be a complicated project.
Hundred million give or take, and I don't have a formal estimate but say two thirds of babies are found these days and one percent of people are at any given time babies, so million and a half a year, worldwide, about.
...yeah. Maybe you could take some of them but you cannot completely solve the problem like that. At least not on a parents-as-opposed-to-creche model.
...no, dead people continue to be dead, and frankly if I had to pick I'd much rather prioritize adults with friends and projects and communities over babies, can we import that trick?
Nnnnnno humans all die eventually. Did you not derive this from the "million and a half babies a year, about one percent of the population is babies" estimation.