The total fertility rate of Less developed regions is projected at 2.21 children per woman in 2039 — above the replacement level of about 2.1. Births are projected to be most frequent among women aged 25-29 (127 per 1,000 women in that age group), and the average mother would be 28.6 years old. In total, 123,779,669 babies are projected to be born. Source: United Nations, World Population Prospects 2024 (medium-variant projection).

Key indicators, 2039

Total fertility rate

2.21

Births

123,779,669

Births per 1,000 people

15.8

Mean age of mothers

28.6

Births to mothers aged 15–19

8.1%

Net reproduction rate

1.03

Boys per 100 girls at birth

104.7

Population

7,835,669,929

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, 2039

Mother's age	Births per 1,000 women	Share of total fertility	Births
10-14	0.8	0.2%	222,427
15-19	35.9	8.1%	10,065,493
20-24	103.2	23.4%	30,279,012
25-29	126.7	28.7%	36,730,253
30-34	100.6	22.8%	27,406,735
35-39	53.6	12.1%	13,845,499
40-44	18.1	4.1%	4,472,951
45-49	2.9	0.7%	717,306
50-54	0.2	0.0%	39,942

Fertility in Less developed regions by year

Fertility in Less developed regions, 2039

Year

Country