Some Mothers Day then and now statistics and figures.

The current median age for giving birth in the United States is age 30.  

Yes, you've seen these couples here before.

For women born in the 1910 to 1935 time frame, having a first birth over age 30 was fairly rare, with less than 10% of women falling into that category.  This was up to 20% by the 1960s. 

Women born in 1935 had the lowest average age of first birth for the 20th Century, with the same being 20.8 years of age. This supports, FWIW, what we earlier noted about average marriage ages, which dropped in the 1950s, before climbing back up to the usual historic norms, contrary to the assumption that marriage ages were historically low, which is incorrect.

The average first age for women born in 1910 was 21.1.  The average for women born in 1960 was 22.7. 

As of 2018, in the US, it was 26.9 years of age.  How this correlates to the "women born" statistic we're otherwise using is a little dicey, even though it would appear to be a simple application of math, but it would be basically women born in the 2000s.

That is, in other words, way up.

In Europe, currently, first time mothers are on average 27 to 29 years of age, up from 23 to 25 years of age in the 1970s.  In Spain, the median age is over 30 for first births.

Women born in 1935 had on average three births, the highest of the following three generational cohorts. 

Births per woman Year cohort completed fertility 

1910 cohort: 2.4 

1935 cohort: 3.0 

1960 cohort: 2.0

This is, I'd note, considerably lower than is often presumed.  Having said that, family sizes were larger in prior years.

During the 1920s in the United States, the average age at which a woman would have her last child was 42.

In France, as sort of a random statistic, the current abortion rate mirrors the children lost in childbirth rate of approximately a century ago.  I don't know what a person makes of that, if anything, but as this is a statistical thread, there's that stat.

In the US, along a similar line, at least as of about a decade ago, the number of "single mothers" due to a father not having a role, for one reason or another, actually equated with the same figure in the late 19th Century due to male accidental deaths.

My own mother was 37 when she had me, an age that seems pretty old in context.  She's just turned that age, actually.

She was one of seven children.

When she and my father married, in 1958, she was 32, above the median age that women tended to marry at the time.  Her mother and my grandfather on her side were also above the median age when they married, actually.  Her mother's first name was Leocadia, a name that hasn't repeated in the family since then.  People tend to call her "Leo", which we of course tend to think of as a male name.  Oddly my father's mother, whose first name was Katheryn (a name which has repeated quite a bit in the family), was usually called "Bob".  My father, in contrast to my mother, was one of four children, a more typical family size for people born in the 1920s.