In 2023, there were five countries, where the average woman of childbearing age can expect to have over six children throughout their lifetime. In fact, of the 20 countries in the world with the highest fertility rates, Afghanistan and Yemen are the only countries not found in Sub-Saharan Africa.Â
High fertility rates in Africa
With a fertility rate of 6.13 and 6.12 children per woman, Somalia and Chad were the countries with the highest fertility rate in the world. Population growth in Chad is among the highest in the world. Lack of healthcare access, as well as food instability, political instability, and climate change, are all exacerbating conditions that keep Chad's infant mortality rates high, which is generally the driver behind high fertility rates. This situation is common across much of the continent, and, although there has been considerable progress in recent decades, development in Sub-Saharan Africa is not moving as quickly as it did in other regions.
Demographic transition
While these countries have the highest fertility rates in the world, their rates are all on a generally downward trajectory due to a phenomenon known as the demographic transition. The third stage (of five) of this transition sees birth rates drop in response to decreased infant and child mortality, as families no longer feel the need to compensate for lost children. Eventually, fertility rates fall below replacement level (approximately 2.1 children per woman), which eventually leads to natural population decline once life expectancy plateaus. In some of the most developed countries today, low fertility rates are creating severe econoic and societal challenges as workforces are shrinking while aging populations are placin a greater burden on both public and personal resources.
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United Nations Department of Economic and Social Affairs (UN DESA). (October 7, 2025). The 20 countries with the highest fertility rates in 2023 [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved July 26, 2026, from /statistics/262884/countries-with-the-highest-fertility-rates/
United Nations Department of Economic and Social Affairs (UN DESA). "The 20 countries with the highest fertility rates in 2023." Chart. October 7, 2025. ÌÇÐÄÆÆ½â°æ. Accessed July 26, 2026. /statistics/262884/countries-with-the-highest-fertility-rates/
United Nations Department of Economic and Social Affairs (UN DESA). (2025). The 20 countries with the highest fertility rates in 2023. ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: July 26, 2026. /statistics/262884/countries-with-the-highest-fertility-rates/
United Nations Department of Economic and Social Affairs (UN DESA). "The 20 Countries with The Highest Fertility Rates in 2023." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 7 Oct 2025, /statistics/262884/countries-with-the-highest-fertility-rates/
United Nations Department of Economic and Social Affairs (UN DESA), The 20 countries with the highest fertility rates in 2023 ÌÇÐÄÆÆ½â°æ, /statistics/262884/countries-with-the-highest-fertility-rates/ (last visited July 26, 2026)
The 20 countries with the highest fertility rates in 2023 [Graph], United Nations Department of Economic and Social Affairs (UN DESA), October 7, 2025. [Online]. Available: /statistics/262884/countries-with-the-highest-fertility-rates/