Data Insight: Fertility rates across many countries have converged, despite starting from very different levels
1. Key Themes
Global Fertility Rate Convergence Below Replacement Level
Fertility rates across vastly different countries have converged toward a narrow band around 1.6–1.7 births per woman, well below the ~2.1 replacement rate. The chart shows that Qatar (3.8→1.7), Iran (3.7→1.7), Malaysia (3.4→1.6), Colombia (3.0→1.6), Turkey (2.9→1.6), and Brazil (2.7→1.6) all landed near the same endpoint as the UK (1.8→1.6) and USA (2.0→1.6) by 2023 — despite radically different starting points.
"Fertility rates have fallen a lot across Asia and South America... This marks a much faster demographic transition than many countries experienced historically."
The Demographic Floor Is Still Falling in Some Markets
Convergence toward ~1.6 is not the endpoint everywhere — a subset of countries is trending significantly lower, suggesting a two-tier demographic future.
"Some have fallen far below these levels: in Chile and Thailand, the fertility rate was 1.2 births per woman in 2023, and may have fallen even further."
2. Contrarian Perspectives
The Middle East and Muslim-majority nations are not demographic outliers anymore. A common assumption is that religiously conservative or high-GDP-oil states maintain high birth rates. The data directly contradicts this: Qatar dropped from 3.8 to 1.7 and Iran from 3.7 to 1.7 in just 30 years — both now sit at sub-replacement levels comparable to Western Europe.
"In Qatar and Iran, rates dropped from almost 4 births per woman to 1.7."
Speed of demographic transition is accelerating, not slowing. The historical assumption is that demographic transitions take generations. The data shows countries like Malaysia (3.4→1.6) and Colombia (3.0→1.6) compressed what took Western Europe over a century into roughly 30 years.
"This marks a much faster demographic transition than many countries experienced historically."
3. Companies Identified
No specific companies are mentioned in this article.
4. People Identified
Hannah Ritchie
- Description: Researcher and author at Our World in Data
- Why mentioned: Author of this data insight on global fertility convergence
- Quote: Byline: "By Hannah Ritchie"
Esteban (last name not provided)
- Description: Colleague researcher at Our World in Data
- Why mentioned: Previously wrote a related piece on Colombia's fertility decline
- Quote: "my colleague Esteban previously wrote about the latter [Colombia]"
5. Operating Insights
Emerging market consumer businesses must reprice their long-term demographic assumptions. Countries like Brazil, Turkey, Colombia, and Malaysia — often modeled with younger, growing population tailwinds — are now at 1.6 births per woman. Businesses built on population growth in these markets face the same aging-consumer headwinds as Western Europe far sooner than most models anticipate.
"Fertility rates have fallen a lot across Asia and South America... This marks a much faster demographic transition than many countries experienced historically."
Workforce and talent planning in the Middle East needs revision. Qatar and Iran at 1.7 births per woman signals a coming labor force contraction in markets often assumed to have demographic momentum. Businesses and investors relying on organic domestic workforce growth in these regions should stress-test their human capital pipelines.
"In Qatar and Iran, rates dropped from almost 4 births per woman to 1.7."
6. Overlooked Insights
The 1.2 births-per-woman floor in Chile and Thailand may signal a distinct "ultra-low fertility" category. While most coverage focuses on below-replacement fertility (~1.6–1.8), Chile and Thailand at 1.2 — and potentially still falling — represent a qualitatively different demographic crisis. This level, if sustained, implies population halving within two generations and has severe implications for pension systems, healthcare demand, and long-term real estate markets in those countries.
"In Chile and Thailand, the fertility rate was 1.2 births per woman in 2023, and may have fallen even further."