The charts illustrate the average number of children born to one woman and the average age at which women had their first child in the UK and Kazakhstan from 1920 to 2019.
Overall, both countries experienced a significant decline in the average number of children born per woman over the century. In 1960, the UK had average of 2.8 children per woman, while Kazakhstan had a much higher rate of 4.5. However, by 2019, both countries had reduced their birth.
Regarding the average age at which women had their first child, there has been a noticeable trend towards delayed childbirth in both countries. The UK saw a gradual increase from 26.5 years old in 1920 to 28.9 years old in 2019. Similarly, Kazakhstan experienced a rise from 23.5 years old to 27.6 years old over the same period.
The connection between the two charts is evident in the correlation between declining birth rates and the increasing age at first birth. As women delay having their first child, it typically results in a smaller overall family size. This trend is particularly pronounced in the UK, where the average age at first birth has increased more rapidly than in Kazakhstan.