A lot of it is cultural OP.
At my school, nobody even thought about having babies when they were 18. The approved route was university, a year of travelling, then working for 10 years whilst also finding a man and getting married, and then a baby in early 30s.
Interestingly it hasn’t really cracked up like that for many of them.
I messed around workwise, and only found what I wanted to do when I was 25. I then found out I was expecting DD when I was 26, and had DS when I was 29. Juggling the two together has been extremely hard but overall I have no regrets. I’m now 34, my youngest is off to school next year. The nursery bills are ending. I have no university debt as it was all paid for by my employer. I have a 10 year, solid relationship. We have a nice house and my body is now shifting back to what it was pre kids.
My friends by comparison seem to fall into a few camps. Some did follow the conventional route above but now can’t conceive. Many didn’t - they struggled to find graduate work after the crash, and are lumped with a shitload of debt and a mediocre job paying an average salary. Most of the offers from men dried up as they approached mid 30s and a fair few of the ‘university couples’ split around this point too. So many are either single, skint or going through IVF.
I don’t think the ‘approved route’ holds much water any more, the worlds changed. University doesn’t really pay in the way it used to. The gap between the working and middle classes is fairly small. Online dating has decimated what used to be an easier route to marriage.
I saw an interesting post on here a while ago by a woman who did the ‘approved route’ and noted her life now, at 40, isn’t that dissimilar from her friend who had a baby soon after they left school but knuckled down shortly after. They live in similar houses and have similar disposable income, only difference being her friend has older and more independent kids now.
That said 16 is very young and different to 22 or 23.