There are some books out there that cover the very little that we do know (I've read a bunch of them) but the big takeaway is that we don't know a lot. The reason is that you can't create great studies with babies.
The good news is that you don't need to "fix" or "maintain" a baby. They need their basic needs met, they need to feel safe and they need love. Do that for a year and then you get a toddler.
The good news is that you don't need to "fix" or "maintain" a baby. They need their basic needs met, they need to feel safe and they need love. Do that for a year and then you get a toddler.