The total fertility rate of Less developed regions is projected at 2.23 children per woman in 2036 — above the replacement level of about 2.1. Births are projected to be most frequent among women aged 25-29 (129 per 1,000 women in that age group), and the average mother would be 28.5 years old. In total, 123,432,552 babies are projected to be born. Source: United Nations, World Population Prospects 2024 (medium-variant projection).

Key indicators, 2036

Total fertility rate

2.23

Births

123,432,552

Births per 1,000 people

16.1

Mean age of mothers

28.5

Births to mothers aged 15–19

8.5%

Net reproduction rate

1.03

Boys per 100 girls at birth

104.8

Population

7,658,595,198

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, 2036

Mother's age	Births per 1,000 women	Share of total fertility	Births
10-14	0.8	0.2%	237,463
15-19	36.2	8.1%	10,483,858
20-24	106.2	23.8%	31,344,107
25-29	128.8	28.8%	36,238,078
30-34	99.9	22.4%	26,394,946
35-39	53.3	11.9%	13,501,033
40-44	18.1	4.0%	4,436,040
45-49	3.1	0.7%	755,756
50-54	0.2	0.0%	41,211

Fertility in Less developed regions by year

Fertility in Less developed regions, 2036

Year

Country