I'm mid 20s I think it's two fold
On one hand people my age have the choice now and we can see just how tough parenting is and some of us are saying that's not for me. I'm just choosing not to have children.
On the other hand, I think it all starts with the housing crisis, increasingly my friends are in old can no longer afford to even rent a one bedroom apartment they are flat sharing as a couple, they can't save for a deposit and renting with children as hell a lot of Landlord will refuse people because they can get more money from a HMO.
Then, if you get over the issue of housing childcare is so expensive, and flexibility with employers. I also think a lot of women just see how the burden always falls on them and saying yeah I don't want to do that. I'd rather be in a couple with dual income but no kids.
but if the government was serious about this, they would really just start building social housing on mass, it's costing councils more to put people in temporary accommodation than it is just to go on a mass building program of social housing. Labour parrot on about how we will get more building done but developers won't build if people can't afford them, and they're not going to increase the supply that much that it brings house prices down