I can think a couple of reasons.
https://www.npr.org/2021/07/26/1020810561/baby-bust-explaining-the-declining-u-s-birth-rate
I can think a couple of reasons.
https://www.npr.org/2021/07/26/1020810561/baby-bust-explaining-the-declining-u-s-birth-rate
Definitely has no reason to do with how expensive it is to exist, let alone care for another human being.