The total fertility rate of Least developed countries is projected at 3.72 children per woman in 2027 — above the replacement level of about 2.1. Births are projected to be most frequent among women aged 25-29 (179 per 1,000 women in that age group), and the average mother would be 28.6 years old. In total, 37,887,430 babies are projected to be born. Source: United Nations, World Population Prospects 2024 (medium-variant projection).

Key indicators, 2027

Total fertility rate

3.72

Births

37,887,430

Births per 1,000 people

29.8

Mean age of mothers

28.6

Births to mothers aged 15–19

14.7%

Net reproduction rate

1.68

Boys per 100 girls at birth

103.8

Population

1,271,821,409

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, 2027

Mother's age	Births per 1,000 women	Share of total fertility	Births
10-14	2.6	0.3%	185,575
15-19	85.3	11.4%	5,586,884
20-24	176.0	23.6%	10,429,145
25-29	178.5	23.9%	9,335,363
30-34	147.4	19.8%	6,734,980
35-39	99.5	13.3%	3,814,057
40-44	45.0	6.0%	1,491,887
45-49	11.1	1.5%	296,629
50-54	0.6	0.1%	12,907

Fertility in Least developed countries by year

Fertility in Least developed countries, 2027

Year

Country