I really don't know what the solution to this is but the problem always seems to be to put the blame on women. Women are having too fewer babies, leaving them too late or don't want to have them. No one seems to mention there's plenty men who don't want children or don't want to have them earlier either.
I'm uncomfortable with the idea that people should be guilt tripped or encouraged into having children or bigger families when they don't want this or have other reasons they may not want children or more than one.
Being a parent is so hard, our society isn't designed to support parents and especially mothers. You only need to read posts on here telling mums on maternity leave that they should do all the house work, deal with all the night wakings, not leave your baby with anyone no matter how exhausted or overwhelmed you are because it's more important that your husband/partner needs all his rest for working plus downtime when he gets home. Housing is so expensive as is child care it's no wonder no one wants do it more than once or even do it at all. We're then expected to intensely parent our children well into adulthood, not let them out our sight, not let them outside to play, take them to a million activities a week, drive them everywhere while never meeting our own needs.
I love my child but I can absolutely understand the reason for the fertility decline and people deciding children isn't for them.