I had my first at 26 and will have my second (and probably last) at 31.
With my first I was definitely the youngest mum in all my social circles.
Now with this second one I've got a few friends who are also having babies.

I'd rather stop here, just cause I think 2 is a good number for us. DH also agrees with 2 but is also quite motivated by age, he's 37 now and doesn't like the idea of being 60 when his child is 20.

I also know people who've had kids from 18 till 45. You've just got to work with the way your life goes.