Funny how, now, 24 and 27 are considered early to have children. Just one generation earlier, my mum was married at not quite 19, and had me before she was 20. And earlier generations might have thought she dragged her heels a bit!
My nieces and nephews - two of them have had children quite young (and unexpectedly), but the four oldest at 31, 26, 26 and 25 are not even thinking about children yet.
My mother was 22. My father had just turned 21 and he used to tell me about how he had all baby stuff for his 21st birthday! :D