For instance, with the way things are going (i.e. me not being close to having kids), my parents will likely become grandparents when they’re nearing 70, a couple decades later than my grandmother.
In Brazil, where I’m from, this shift is quite recent. Until just one or two generations ago people were having multiple kids, and at very young ages. Now, I don’t have a single friend in my mid-to-late twenties friend group who has already had a kid.
So while the older generations are living longer and giving themselves a better shot at having great-grandkids, their descendants’ habits aren’t really helping.
But even more interesting is that this “age of great-grandmothers” as I like to call it not only is ending, but it hasn’t been here for long either.