The total fertility rate of Less developed regions is projected at 2.32 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 (134 per 1,000 women in that age group), and the average mother would be 28.2 years old. In total, 121,355,871 babies are projected to be born. Source: United Nations, World Population Prospects 2024 (medium-variant projection).

Key indicators, 2027

Total fertility rate

2.32

Births

121,355,871

Births per 1,000 people

17.1

Mean age of mothers

28.2

Births to mothers aged 15–19

9.5%

Net reproduction rate

1.07

Boys per 100 girls at birth

105.2

Population

7,080,558,916

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	1.0	0.2%	304,380
15-19	39.8	8.6%	11,550,676
20-24	119.8	25.8%	32,470,576
25-29	133.6	28.7%	34,632,413
30-34	97.3	20.9%	24,461,168
35-39	51.1	11.0%	12,900,322
40-44	18.2	3.9%	4,249,351
45-49	3.6	0.8%	744,445
50-54	0.2	0.0%	42,501

Fertility in Less developed regions by year

Fertility in Less developed regions, 2027

Year

Country