... who is this question aimed at? are you asking 30 year old women? 14 year old girls? i dont think youd be able to get a sufficient enough answer to generalise either way. im a 19 y o girl and i hate the idea of having kids so obviously for me, not at all. i have a friend who probably does want them, but doesnt feel any particular pressure to choose the guy that she plans on being with forever just yet, so his opinion on kids is probably useless info
anyways, at the end of the day even if there was a general trend either way, unless you are doing some kind of legitimate social study, it shouldnt matter. if a guy was 'turned off' from me because i dont want kids i wouldnt change my views for him, or lie about it, just like hopefully a guy who feels the same wouldnt either if he and his girlfriend disagreed on the matter.
if i went out with a gy who wanted kids at some point in his life then i probably wouldnt care. if he wanted them like, right now, then obviously it wouldnt work.
some people, men and women, want kids, and so yeah obviously at some point their partner wanting them too would become relevant. i wouldnt call that a turn off though, thats just sensible planning for the future to take into account whether your plans are cohesive or not. but if you arent at the age where you are planning to settle i cant imagine it being an issue, not least because if youre with someone when youre 18 who says they do/dont want kids, and you dont feel the same, theres plenty of time for opinions to change. i dunno, thats just my view