As fds followers what can we do to prevent this

It's easy to prevent this! Don't worry. No man can waste your time trying to have children if you don't let him.

You have to prioritize your future family, and be ready to leave him as soon as you find out he's not intentional about becoming a father.

If he has doubts, he's not the one.

Good signs:

he's ok with visiting a doctor to see if he's ok down there,

He's serious about regularly trying to conceive,

He doesn't have excuses,

He's saving up for his future children,

He's learning about how to become a father, he's thinking about role models, he's talking to his friends about it, he talks to friends who are already fathers...

As a woman you're going to go throughout a lot of hormonal changes, WILLINGLY or not. He will too, but not at the same rate, so he has to put the work VOLUNTARILY and prepare himself, he cannot leave it to chance.

Basically, if he doesn't want it more than you, he's already not putting enough energy, because you will put your whole body and life into it, he will have to put the mind, the organization, the financial thinking...he can't just half ass it and stand there saying meh okay if you really want it...

Trust me if a man wants to be a father you will know because he will mention his "future children" and actually appear bothered about the strategy, the logistics... If he's not already thinking about it LET HIM GO.

Of course there's a whole lot of vetting to do with men who want children (basic ones: is he a pədo/pərv/unsafe? Health issues? Genetic issues?.....) but it would be wasted on males who are not enthusiastic about becoming fathers SOON (NO, the "yeah one day I'd like to be a father" are NOT OK).