Fertility in New Zealand, 2017
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2017
Total fertility rate: 1.81
The total fertility rate of New Zealand was 1.81 children per woman in 2017 — below the replacement level of about 2.1. Births were most frequent among women aged 30-34 (115 per 1,000 women in that age group), and the average mother was 30.3 years old. In total, 58,574 babies were born. Source: United Nations, World Population Prospects 2024.
Key indicators, 2017
Total fertility rate
1.81
Births
58,574
Births per 1,000 people
12.2
Mean age of mothers
30.3
Births to mothers aged 15–19
3.9%
Net reproduction rate
0.87
Boys per 100 girls at birth
105.3
Population
4,812,752
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, 2017
| Mother's age | Births per 1,000 women | Share of total fertility | Births |
|---|---|---|---|
| 10-14 | 0.1 | 0.0% | 17 |
| 15-19 | 15.1 | 4.2% | 2,309 |
| 20-24 | 57.2 | 15.8% | 9,277 |
| 25-29 | 94.2 | 26.0% | 16,249 |
| 30-34 | 114.9 | 31.7% | 18,454 |
| 35-39 | 65.7 | 18.1% | 9,891 |
| 40-44 | 14.2 | 3.9% | 2,202 |
| 45-49 | 1.0 | 0.3% | 175 |
| 50-54 | 0.0 | 0.0% | 0 |
Fertility in New Zealand by year