One of the most consequential stories of our time is unfolding quietly, in birth statistics. Across nearly every country, women are having fewer children — and the world is approaching a demographic threshold it has never crossed in the modern era. Here is the current data on fertility, globally and in India, with the drivers behind it and what it means for the decades ahead.
Editor's note: Figures are drawn from the UN's World Population Prospects 2024, India's National Family Health Survey (NFHS-5) and related official sources, listed at the end. Demographic figures are estimates that vary slightly by source and year.
First, the key number: TFR
The headline metric is the Total Fertility Rate (TFR) — the average number of children a woman would have over her lifetime at current birth rates. The crucial benchmark is the replacement level of 2.1: the rate at which a population roughly replaces itself over time, without migration. Below it, and a population eventually shrinks.
That benchmark is now the exception, not the rule.
The global picture: closing in on replacement
In 1950, the average woman worldwide had about five children. By 2025, the global TFR has fallen to roughly 2.3 births per woman (UN), down from 3.3 as recently as 1990 — and now barely above the 2.1 replacement line.
But the global average hides the real story, which is how widespread low fertility has become. According to the UN's 2024 projections:
- 131 of 237 countries and territories (55%) are now below replacement level.
- About 71% of the world's population lives in a country or area with fertility below 2.1.
In other words, low fertility is no longer a rich-world curiosity — it's the condition most of humanity now lives in.
India: a demographic transition, accelerated
India's change has been especially striking. From nearly 6 children per woman in the 1950s, the country's TFR fell to 2.0 by 2019–21 (NFHS-5) — reaching the replacement level — and by recent estimates has edged to around 1.9, just below it. For the world's most populous nation, that is a profound shift.
The national average, again, conceals sharp internal contrasts:
- Urban India sits at about 1.6; rural India around 2.1.
- Many southern and western states have fertility well below replacement — comparable to wealthy developed countries — while some northern states remain higher.
India hasn't just slowed its growth; it has quietly joined the majority of the world below the replacement threshold.
How regions compare in 2025
Zoom out and the spread between regions is stark — from societies with the lowest fertility ever recorded to those still growing rapidly.
South Korea, at roughly 0.7, has one of the lowest fertility rates ever recorded; China has fallen to about 1.0; Europe sits near 1.4 and North America around 1.6. At the other end, Africa remains the global outlier at about 4.0 — though even there, the rate has tumbled from 6.5 in 1950 and continues to fall.
What's driving the decline
The causes are remarkably consistent across very different societies — a sign of deep, structural change rather than local accident:
- Women's education. The single most powerful factor. More schooling for girls is tightly linked to later marriage, later childbearing, and smaller families.
- Urbanisation. City living raises the cost of space and child-rearing and shifts the calculus toward fewer children.
- The economics of children. Housing, childcare, healthcare and education have grown dramatically more expensive, making large families costlier than ever.
- Access to family planning. Wider availability of contraception lets couples choose if and when to have children.
- Changing norms. More people are prioritising careers, financial stability and personal goals — and having children later, or not at all.
The consequences — both sides
Falling fertility is neither simply "good" nor "bad." It brings real gains and real strains, often at the same time.
The upside:
- Better maternal and child health outcomes that come with fewer, better-spaced births.
- Expanded education and employment opportunities for women.
- Eased pressure on resources and infrastructure from slower population growth.
The challenge:
- Ageing populations. Fewer young people supporting more retirees — already acute in Japan, South Korea, China and much of Europe.
- A shrinking workforce, which can slow economic growth.
- Rising healthcare and pension costs as the elderly share of the population climbs.
For India, there's a time-sensitive twist. Its still-young population offers a "demographic dividend" — a window where a large working-age population can power growth. But that window is finite: as fertility stays low, the country will eventually age too, making the next couple of decades crucial for converting that youth into education, jobs and productivity.
The bottom line
The data is unambiguous: humanity is undergoing a historic fertility transition. The global rate has slipped to around 2.3 and keeps falling; India has reached and edged below replacement at roughly 2.0; and a clear majority of countries — home to most of the world's people — now sit below the line at which populations replace themselves.
This is, in large part, a story of progress: of girls in school, women with choices, and healthier mothers and children. But it also hands policymakers a generational challenge — to support those who do want children, and to build economies and care systems that work in an older, slower-growing world. The births data has already turned. The harder question is how wisely we respond to it.
Sources
- World Population Prospects 2024: Summary of Results — United Nations
- 5 facts about global fertility trends — Pew Research Center (2025)
- India has achieved a Total Fertility Rate of 2.0 (NFHS-5) — Press Information Bureau, Government of India
- Fertility in India — Data For India
- Fertility rate: children born per woman — Our World in Data
