The total fertility rate of Least developed countries is projected at 2.92 children per woman in 2046 — above the replacement level of about 2.1. Births are projected to be most frequent among women aged 25-29 (146 per 1,000 women in that age group), and the average mother would be 28.7 years old. In total, 42,624,608 babies are projected to be born. Source: United Nations, World Population Prospects 2024 (medium-variant projection).

Key indicators, 2046

Total fertility rate

2.92

Births

42,624,608

Births per 1,000 people

23.3

Mean age of mothers

28.7

Births to mothers aged 15–19

12.6%

Net reproduction rate

1.35

Boys per 100 girls at birth

103.7

Population

1,829,222,581

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, 2046

Mother's age	Births per 1,000 women	Share of total fertility	Births
10-14	1.5	0.3%	137,122
15-19	61.1	10.4%	5,382,075
20-24	135.5	23.1%	11,139,378
25-29	146.4	25.0%	10,879,565
30-34	123.0	21.0%	8,211,049
35-39	77.8	13.3%	4,725,553
40-44	33.0	5.6%	1,802,297
45-49	7.0	1.2%	333,358
50-54	0.3	0.1%	14,206

Fertility in Least developed countries by year

Fertility in Least developed countries, 2046

Year

Country