I got married in the late 1960s, when the average age for a first marriage was around 20/21. I was 24, as was DH.
On several occasions before this, remarks were made to me - and the friend I shared a flat with - that suggested that we were 2 old maids who were now too old to get a husband -and of course, as both of us were graduates - are chances of marrying were small because men did not like clever women!
I did not have my first child until I was 28 - and again, got in the neck for leaving it so late! - I was classified as an elderly prima gravida, and was kept in hospital for a week, instead of three days, after the birth.
We lived in a new town, where most women seemed to have their first child before they were 20. When the midwife at the surgery commented on my age I replied that I thought it best to make sure I was fully adult myself before taking responsibility for a baby. She then looked significantly towards the waiting room, full of pregnant teenagers and said that she thought that was not a bad idea.