Births per 1,000 women, by age of mother

Fertility in Northern America, 1973

Northern America
1973
Total fertility rate: 1.91
Total fertility rate, 1950–2100 · click to pick a year

Year

-5 -1   1973  +1 +5

Country

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

The total fertility rate of Northern America was 1.91 children per woman in 1973 — below the replacement level of about 2.1. Births were most frequent among women aged 20-24 (122 per 1,000 women in that age group), and the average mother was 25.9 years old. In total, 3,636,824 babies were born. Source: United Nations, World Population Prospects 2024.

Total fertility rate
1.91
Births
3,636,824
Births per 1,000 people
15.3
Mean age of mothers
25.9
Births to mothers aged 15–19
18.1%
Net reproduction rate
0.91
Boys per 100 girls at birth
105.3
Population
237,625,600
The net reproduction rate counts only daughters who survive to their mothers' age: below 1, each generation of women is smaller than the one before.
Mother's ageBirths per 1,000 womenShare of total fertilityBirths
10-141.50.4%17,076
15-1957.414.9%659,436
20-24122.231.8%1,268,675
25-29116.130.2%1,065,542
30-3458.515.2%437,897
35-3922.75.9%148,311
40-445.51.4%36,416
45-490.50.1%3,421
50-540.00.0%48