The total fertility rate of Less developed regions is projected at 2.28 children per woman in 2031 — above the replacement level of about 2.1. Births are projected to be most frequent among women aged 25-29 (132 per 1,000 women in that age group), and the average mother would be 28.4 years old. In total, 122,305,631 babies are projected to be born. Source: United Nations, World Population Prospects 2024 (medium-variant projection).

Key indicators, 2031

Total fertility rate

2.28

Births

122,305,631

Births per 1,000 people

16.7

Mean age of mothers

28.4

Births to mothers aged 15–19

9.2%

Net reproduction rate

1.05

Boys per 100 girls at birth

104.9

Population

7,345,215,379

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.

Fertility by age of mother, 2031

Mother's age	Births per 1,000 women	Share of total fertility	Births
10-14	0.9	0.2%	270,108
15-19	37.6	8.2%	11,192,002
20-24	113.4	24.8%	32,185,838
25-29	132.0	28.9%	35,147,842
30-34	98.7	21.6%	25,215,112
35-39	52.6	11.5%	13,071,844
40-44	17.7	3.9%	4,413,821
45-49	3.4	0.7%	766,549
50-54	0.2	0.0%	42,413

Fertility in Less developed regions by year

Fertility in Less developed regions, 2031

Year

Country