Analyzing Population Patterns: Trends in India and Developing Countries

The story of how many children people choose to have is rarely just about biology. It is shaped by schools, hospitals, jobs, gender norms, and the policy choices of governments. Over the last seven decades, India and most developing countries have moved from large families being the norm to a future where many regions will struggle to replace their populations. Understanding these shifting population patterns, especially through the lens of the Total Fertility Rate (TFR), helps us see not just where we have been, but where social policy needs to go next.

What population patterns really tell us 🔗

Population patterns refer to the long-term trends in how a population grows, stabilises, or shrinks. The single most useful indicator for understanding these patterns is the Total Fertility Rate – the average number of children a woman is expected to have during her reproductive years. A TFR of around 2.1 is called the replacement level, because it is roughly the number needed for one generation to replace itself, accounting for child mortality.

When TFR stays well above 2.1, populations grow quickly and pressure builds on schools, jobs, and natural resources. When it drops well below 2.1, populations age and eventually shrink, raising different concerns about pensions, labour shortages, and care for the elderly. India and much of the developing world are currently moving through this transition, but at very different speeds.

India’s fertility journey: from 5.9 to below replacement 🔗

In 1950, an average Indian woman was expected to have close to six children in her lifetime. By 2019-21, the National Family Health Survey (NFHS-5) reported that India’s TFR had declined to 2.0 children per woman, dipping below the replacement level of 2.1. The most recent Sample Registration System estimates suggest fertility has fallen further, with TFR estimated at around 1.9 children per woman in 2023.

This is a dramatic shift. A country that was once associated globally with rapid population growth is now, on average, having fewer children than needed to sustain its population size in the long run. The change has been driven by rising female education, later marriage, declining infant mortality, expanded contraceptive access, and changing aspirations among urban and rural families alike.

The role of family planning and child survival 🔗

Two forces deserve special mention. First, family planning access expanded steadily: the contraceptive prevalence rate rose to 66.7% under NFHS-5, with modern method use at 56.5%. Second, child survival improved sharply: India’s infant mortality rate dropped from 66 per 1,000 live births in 2000 to 28 in 2023. When parents become confident that their children will survive, they tend to have fewer of them. These two shifts together explain much of the national decline.

State-wise variations: many Indias inside one India 🔗

The national average hides enormous diversity. Indian states are at very different points in the fertility transition, almost as if they belong to different countries demographically.

The early movers in the south and west 🔗

Kerala was the first Indian state to reach replacement fertility back in 1988, when the national TFR was still around 4. Tamil Nadu followed in 1993, and Andhra Pradesh in 2004. West Bengal, despite being economically poorer, reached replacement fertility in 2005 – a reminder that fertility decline is not driven by income alone but also by education, women’s autonomy, and access to health services.

Today, fertility in much of southern and western India sits at levels comparable to developed countries. Maharashtra’s fertility rate is lower than that of Norway, and seven major Indian states are projected to have a TFR of just 1.5 by 2035. This is so low that some southern leaders, like Andhra Pradesh’s chief minister, have begun discussing incentives for families to have more children – a striking reversal of the small-family messaging of earlier decades.

The late movers in the north and centre 🔗

At the other end, Bihar, Meghalaya, Uttar Pradesh, Jharkhand and Manipur still had fertility rates above the replacement level of 2.1 in NFHS-5. Bihar is projected to be the last state to reach replacement, possibly only by 2039. Uttar Pradesh and Madhya Pradesh are expected to cross that line by 2025 and 2028, respectively.

These differences track closely with female literacy, age at marriage, and women’s labour-force participation. In Bihar, where female literacy hovers around 53% and son preference remains strong, the average woman has more children than in Kerala, where literacy is near universal and women marry much later.

Wealth, education and fertility 🔗

Within every state, similar inequalities exist. NFHS-5 data show that women in the poorest 20% of households have a TFR of about 2.6, while those in the richest 20% have a TFR of 1.6 – a one-child gap driven largely by differences in education and access to contraception. Modern contraceptive use is only around 48% among the poorest women compared with about 65% among the richest. Educated women – those with 12 or more years of schooling – have a TFR of just 1.7, against 3.2 for women with no schooling.

Patterns across developing countries 🔗

India’s fertility story is part of a larger global picture. According to the United Nations World Fertility 2024 report, the global TFR is now estimated at 2.2 births per woman, down from 3.3 in 1990. Roughly two-thirds of the world’s population now lives in countries where fertility is already below 2.1.

Asia and Latin America: rapid convergence 🔗

Central and South Asia together have a regional TFR of about 2.2, while East Asia is well below replacement, with countries like China, South Korea, and Thailand reporting some of the lowest fertility rates in the world. Latin American countries such as Brazil and Chile have also moved below replacement, driven by urbanisation, education, and women’s economic participation. The transition that took Western Europe roughly a century has occurred in many of these countries in just two or three generations.

Sub-Saharan Africa: the outlier 🔗

Sub-Saharan Africa stands apart. The regional fertility rate there is about 4.3 children per woman, and countries such as Niger, the Democratic Republic of the Congo, Chad and Somalia still record TFRs above 5. Although fertility is declining here too, and in fact faster than earlier UN projections expected, the region’s young age structure means its population will keep growing for decades. Sub-Saharan Africa is projected to add nearly two-thirds more people by 2050, accounting for most of the world’s population growth in this period.

These differences matter because they reshape where global investment in health, education and infrastructure must focus. While India worries about ageing in its southern states, much of Africa is still in the middle of its fertility transition with very different needs.

What falling fertility means for policy 🔗

A TFR that hovers around or below replacement level changes the questions a country must answer. India is now in this complex middle zone, where some states are still managing the consequences of high fertility while others are beginning to face the consequences of low fertility.

Healthcare and women’s reproductive rights 🔗

Even with fertility below replacement, India still has an unmet need for family planning of about 9.4% according to NFHS-5, with unmet needs for spacing at 4% and limiting at 5.4%. This gap is sharper among adolescents and women in poorer states. In Uttar Pradesh, the unmet need among adolescent women is as high as 19%. Closing this gap matters not just for fertility numbers but for women’s health, autonomy, and ability to plan their lives.

Maternal health services, safe abortion access, and counselling for contraceptive choice need to remain front and centre, even as national fertility stabilises. A small-family norm is meaningful only if women can actually act on their own reproductive preferences.

Education, jobs and the demographic dividend 🔗

As fertility falls, the share of working-age people in the population rises temporarily – the so-called demographic dividend. India’s dividend is expected to peak around 2041. Reaping it requires massive investment in school quality, vocational training, and job creation, particularly in states like Bihar and Uttar Pradesh where the youth population is still growing. Without these investments, a large youth cohort can become a source of unemployment and unrest rather than economic growth.

Preparing for an ageing society 🔗

States that achieved replacement-level fertility decades ago are now facing rapid population ageing. Kerala already has an elderly population structure closer to Europe than to north India. Healthcare systems must shift focus toward managing diabetes, heart disease, dementia, and other non-communicable conditions, while pension and elderly-care systems need strengthening. Sub-national variation means that India will simultaneously need policies for youth in one region and policies for the elderly in another.

Resource allocation and federal transfers 🔗

Population patterns also raise sensitive political questions. India’s parliamentary seats and central tax devolution have historically been linked to population size. States that succeeded in reducing fertility early worry that they will lose representation and funds to states that did not. As delimitation discussions return, the link between fertility patterns and political power will be one of the country’s most difficult policy debates in the coming decade.

The bigger picture 🔗

The shift from a TFR of 5.9 in 1950 to below 2.0 in 2023 is one of the most consequential social changes India has ever seen. It is the result of millions of individual decisions by women and families, supported by improvements in health, education, and contraceptive access. The picture across the developing world is broadly similar, with sub-Saharan Africa as the major exception still moving through the transition.

Population patterns are no longer simply about whether a country has “too many” people. They are about how societies redistribute opportunity, care, and political voice as their demographic structure changes. Whether the future is one of squandered dividends or shared prosperity will depend on whether policy keeps pace with these patterns rather than trailing behind them.

What do you think? If your home state has already reached replacement-level fertility, what should be the next priority – preparing for an ageing population, or first ensuring that every woman has full control over her reproductive choices? And do you think incentivising larger families, as some Indian states are now considering, will actually work where the small-family norm has already taken root?

References

1. https://www.pib.gov.in/PressReleasePage.aspx?PRID=1847431
2. https://www.dataforindia.com/fertility/
3. https://casi.sas.upenn.edu/iit/data-for-india-rukmini-2025-part-two
4. https://www.drishtiias.com/daily-news-analysis/nfhs-5-national-report
5. https://www.un.org/development/desa/pd/sites/www.un.org.development.desa.pd/files/undesa_pd_2025_wfr_2024_final.pdf
6. https://www.ined.fr/en/everything_about_population/demographic-facts-sheets/focus-on/2024-les-nations-unies-publient-de-nouvelles-projections-de-population-mondiale
7. https://en.wikipedia.org/wiki/Human_population_projections
8. https://www.nature.com/articles/s41598-023-47191-9
9. https://contraceptionmedicine.biomedcentral.com/articles/10.1186/s40834-024-00335-2