this post was submitted on 23 Jan 2025
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Science Memes

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[–] [email protected] 8 points 14 hours ago (1 children)

First births yes, but what about average age? Our ancestors may have been second born, third born, eighth born etc

[–] [email protected] 3 points 14 hours ago* (last edited 14 hours ago) (1 children)

High maternal mortality meant that having more than about 7 children per woman was rare. Total fertility rate was about 4.5 to 7 in the pre modern era. Population growth was low due to infant and early childhood mortality though.

If you start having children at age 12, you can have a child every year and reach 7 children by age 20. Without contraceptives, people weren’t having such large multi-year gaps between children like we do now.

[–] [email protected] 1 points 7 hours ago

Based on my own genealogical research, the trend I typically saw was 6-8 kids, between 18 and early 30s, about 20% of which died. Plus consider that some of those will be sons, and some daughters never become mothers, 25 is pretty spot on for the average age for a mother-to-mother generational gap.