Personally I feel the worst contributing factor to low TFR is the mismatch between the maturity of women and their fertility window. Many women don't even engag

Personally I feel the worst contributing factor to low TFR is the mismatch between the maturity of women and their fertility window. Many women don't even engage with the thought of family formation until it starts to become a fading possibility. It isn't a very politically correct thing to say so I'll use a throwaway but as women's fertility lowers so does their general attractiveness to men. So right when they start to 'feel ready' they are facing a closing window, a tougher marriage market and it comes after a decade or so of career or academic achievement leaving them with even fewer options as they typically won't date down.