Oh heavens, no, it's not a fashion thing.
The main reason young women are having fewer babies is that it is increasingly difficult to find a man who is marriage material.
Many are hugely entitled, lazy and demanding. Misogyny is through the roof - the fact that Andrew Tait has even one follower let alone the millions he does proves that.
Many young men now think porn is sex (which of course it is not) and think they have the right to stream filmed prostitution straight to their phones as much as they like and wank off anytime anywhere to anyone.
Many manpanderers pretend this is normal too because a cookie from a man might be worth something to them, and they imagine they will be the cool girl exception to the abuse rule.
Many young men think that anal rape, beating choking and other abuse that they try to call a kink is their right and women should be smooth and hairless and utterly obliging pornbots.
Gail Dynes has been talking about this for years and years.
It's not just babies, lots of young women are often opting out of dating men at all, because from every corner they are inundated by filth, misogyny, objectification and demands from man babies.
https://www.healthyscreenhabits.org/s8-episode-5-talking-about-porn-with-the-best-gale-dines-culture-reframed
Some men are trying to counter this tide, but unfortunately many of them are going for the "be a trad wife and do as you are told: approach.
So on the one side you have left wing men who think women's flesh can be purchased and peddled who are weirdly pro choice when it comes to prostitution and abortion but don't seem to give a fuck about women any other time, and on the other right wing men who think they should stay in the kitchen dropping sprogs until they drop dead of exhaustion.
And in the middle are dazed and confused young men who don't know what to do about any of it.
As Dynes says "The sexual script of pornography is that girls and women are disposable sex objects to be used and abused for men's pleasure. That is the key script of pornography. And the key script for boys is that they have no moral compass. They are. In fact, the image of boys and men in pornography is they are life support systems for erect penises. They are devoid of any capacity for intimacy, for connection, for empathy."
And as she points out this is a tragedy for both sexes.
There are still decent men out there - but where to find them?
And although it is fantastic that divorce is easily accessible and that women can work to support themselves, easy splitting up of marriages has given many men the only excuse they needed to ditch the kids and walk away.
It's now the absolute norm for people to have blended families - which don't work for the most part.
Most marriages will fail now, and while the kids are young because women refuse to put up men's shit.
And still, men as a whole seem to make no effort to stay faithful and treat their wives well, they want a whore in the bedroom who earns a good wage and is also a servant who will tolerate anything.
So, no, it's not a fashion trend.
The internet ruined men and men are ruining the world.
The reason women and girls are having less babies in the west - and they are indeed having less babies - is that the smart ones no longer want to risk their lives and their futures knowing that they will likely be abused, used, dumped and then replaced and left as single mothers.
Add to that the rising cost of housing, food and all the essentials and the fact that you cannot parent your children without being told you're wrong from every shouty corner of the world, and the current harmful societal trends among young people making it impossible to keep them truly safe and the amazing thing is that any young women at all are still having kids.
Glad I had my kids when I did. I would not be doing so now.
The internet has devastated social norms and behaviours and massively increased harmful, abusive and selfish behaviour in men - and also in women. The western world is now in large part peopled by narcissists, anxiety ridden shut ins and people who need trigger warnings to open a book and are deeply and genuinely offended by jokes.
I read a tweet that made me laugh the other day - because it's true. "Do married people watch Gen Z dating and feel like they caught the last chopper out of Nam?"
Well, I'm not Gen Z. But yup.