India’s Fertility Transition: From High Birth Rates to Replacement Level

India has quietly pulled off one of the most significant demographic shifts of the twenty-first century. From a country where the average woman bore more than five children in the early 1970s, we have arrived at a moment where the national total fertility rate (TFR) sits at 2.0, just below the replacement level. This is not a small statistical update. It changes how we think about schools, jobs, pensions, healthcare, and even housing for the next several decades. Yet the story is far from uniform. Some states crossed the replacement threshold decades ago, while others are still catching up. Understanding why this happened, and why it happened so unevenly, is essential for anyone studying population in India.

From 5.2 to 2.0: A half-century of decline 🔗

The journey of India’s fertility transition is best understood through numbers, but the numbers themselves tell a powerful story. In 1971, the TFR stood at around 5.2 children per woman. By the time the fifth round of the National Family Health Survey (NFHS-5) was conducted in 2019-21, the figure had dropped to 2.0, slipping below the replacement level of 2.1. This means, on average, Indian women today are having just enough children to replace themselves and their partners, with a slight shortfall.

The decline was not sudden. It unfolded over decades, accelerating in the 1990s and 2000s. Between NFHS-4 (2015-16) and NFHS-5 (2019-21), the TFR fell from 2.2 to 2.0, a relatively small but symbolically huge step. The urban-rural gap also tells its own story: in NFHS-5, urban TFR was 1.6 while rural TFR stood at 2.1. Cities have long led the transition, but villages are catching up faster than many demographers had predicted.

What the replacement level really means 🔗

The replacement level of 2.1 children per woman is the threshold at which a generation just about replaces itself, accounting for child mortality and the fact that not every girl born will survive to her own reproductive years. When fertility drops below this level for a sustained period, population growth eventually slows, stalls, and then reverses, though the effect takes decades because of population momentum, the lag created by a large existing base of young people who still have to enter their childbearing years.

Why fertility fell: The forces behind the transition 🔗

No single factor explains India’s fertility decline. It is the result of overlapping social, economic, and policy changes that reinforced each other over decades.

Female literacy and education 🔗

Perhaps the single strongest predictor of falling fertility is the education of women. Educated women tend to marry later, have better access to healthcare information, and exercise greater agency over reproductive decisions. Female literacy in India rose from about 34% in 1990 to 69% by 2022, a transformation that aligned closely with the steepest part of the fertility decline. Research from the 1980s onwards has consistently shown that adult female literacy and infant mortality are the two strongest determinants of regional variation in rural fertility.

Contraceptive access and family planning 🔗

India was the first country in the world to launch an official family planning programme, back in 1952. Over the decades, this evolved from coercive sterilisation drives during the Emergency to a more rights-based approach focused on choice and reproductive health. The use of modern contraceptives rose from 36.5% in 1992-93 to 56.4% in 2019-21, while the unmet need for contraception fell from 21% to 9.4%. Programmes such as Mission Parivar Vikas have specifically targeted high-fertility districts, distributing contraceptives and counselling services where they are needed most.

Falling infant mortality 🔗

When parents are confident that their children will survive into adulthood, they tend to have fewer of them. India’s infant mortality rate has dropped dramatically since the 1970s, weakening one of the strongest traditional reasons for having many children, the fear of losing some of them. This is a quiet but powerful driver of the fertility transition.

Urbanisation and changing economic incentives 🔗

In agrarian economies, children are often seen as economic assets who contribute labour to the household. In urban, service-driven economies, children are expensive to raise and educate, and they contribute economically only much later. As India urbanised and as aspirations rose, the calculus shifted. Couples now weigh the cost of a child’s schooling, coaching, healthcare, and housing, and many decide that one or two children is enough.

Delayed marriage and changing aspirations 🔗

Indian women today are marrying later than their mothers and grandmothers did. Higher education, employment, and personal aspirations have pushed up the average age at first marriage and first birth. In a striking demographic note, early childbearing is on the decline, with more educated, working women marrying in their late 20s or early 30s and having their first child soon after. This compresses the childbearing window and tends to reduce total fertility.

The uneven map: Regional variations across states 🔗

The national figure of 2.0 hides enormous variation. India’s fertility transition has unfolded at different speeds in different states, shaped by local histories, politics, and levels of development.

The southern lead 🔗

The southern states began their fertility decline well before the rest of the country. Kerala was the first Indian state to reach replacement fertility in 1988, when the national TFR was still 4. Tamil Nadu followed five years later in 1993, and Andhra Pradesh a decade after Tamil Nadu in 2004. By the early 2010s, much of the south was deep into sub-replacement territory. Kerala’s trajectory in particular drew global attention because it achieved low fertility at relatively modest income levels, driven by exceptional human development indicators in health and education.

The northern and central lag 🔗

At the other end of the spectrum sit Bihar, Uttar Pradesh, Madhya Pradesh, Rajasthan, Jharkhand, and Chhattisgarh, often grouped together as the Empowered Action Group (EAG) states. According to the Sample Registration System 2021, Bihar still had a TFR of 3.0, Uttar Pradesh 2.7, Madhya Pradesh 2.6, Rajasthan 2.4, Jharkhand 2.3, and Chhattisgarh 2.2. By the latest projections, Uttar Pradesh is expected to reach replacement fertility around 2025, Madhya Pradesh by 2028, and Bihar last of all in 2039.

The surprising convergence 🔗

Despite the lag, something remarkable is happening: the gap is narrowing. Currently, only one large state (Bihar) has a TFR above 2.5, and only two additional large states (Uttar Pradesh and Jharkhand) remain above the replacement rate. States like West Bengal, often called an outlier because it achieved replacement fertility despite being relatively poor, are now well below replacement. And the Himalayan state of Sikkim has slid to a TFR of around 1.1, which would place it among the lowest-fertility regions in the world.

Why some states moved faster 🔗

The reasons for the southern lead are well documented. Kerala and Tamil Nadu invested early and heavily in public health, female schooling, and primary healthcare. They also had stronger social reform movements and earlier shifts in caste and gender norms. The northern lag, in contrast, reflects persistent gaps in female literacy, weaker public health systems, son preference that pushes families to keep trying until a boy is born, and lower female labour force participation. Interestingly, TFR among Muslim women in Kerala and Tamil Nadu is lower than it is among Hindu women in Bihar and Uttar Pradesh, which shows that regional development levels matter far more than religion in shaping fertility outcomes.

Policy implications: What comes next? 🔗

India’s fertility transition opens up new opportunities and new challenges, and both look different in different parts of the country.

The demographic dividend window 🔗

A falling TFR means a smaller share of dependent children and a growing share of working-age adults. This demographic dividend can power economic growth, but only if jobs, skills, and infrastructure keep pace. States with already-low fertility will exit this window first, while EAG states still have time to capitalise on a young workforce, provided they invest in education and employment.

The ageing challenge 🔗

India is ageing faster than it is getting rich. As fertility falls and life expectancy rises, the share of older citizens is growing. This means pension systems, geriatric healthcare, and old-age support structures need urgent attention, particularly in the south where ageing is already advanced.

Federal tensions and political representation 🔗

Sub-replacement fertility in the south and continued growth in the north could redraw political maps when parliamentary constituencies are eventually re-delimited based on updated population counts. This raises difficult federal questions: should states that successfully reduced their fertility be politically penalised for it through reduced representation? This is becoming one of the more sensitive policy debates of the decade.

From population control to reproductive autonomy 🔗

India’s population policy is gradually shifting from a numbers-driven framework to one centred on reproductive rights and women’s autonomy. The UNFPA argues that India’s real fertility issue is about choice, not numbers, since many women still face barriers in accessing the contraception, spacing, and reproductive healthcare they actually want. The next phase of policy will likely focus less on bringing fertility down and more on supporting healthy, voluntary childbearing decisions.

The bigger picture 🔗

India’s fertility transition is not a triumph or a crisis. It is both an achievement, decades of public health and education investment paying off, and a turning point that demands new thinking. The country now has to plan simultaneously for an ageing south and a still-growing north, for a workforce that needs jobs today and a retirement system that needs to be built for tomorrow. The transition from high to low fertility is one of the defining stories of modern India, and the most interesting chapters may still be ahead.

What do you think? Do you believe India should now actively support couples who want to have children, as several developed countries are doing, or should the focus remain on reproductive autonomy and quality of life? And how should the country balance the political and economic interests of states that are at very different stages of the fertility transition?

References

1. https://pmc.ncbi.nlm.nih.gov/articles/PMC10657051/
2. https://www.shankariasparliament.com/current-affairs/economy/what-the-fertility-rate-decline-means-for-india
3. https://ijmr.org.in/from-population-goals-to-reproductive-health-autonomy-reframing-indias-fertility-transition/
4. https://pubmed.ncbi.nlm.nih.gov/4035721/
5. https://india.unfpa.org/en/news/indias-real-fertility-crisis-about-choice-not-numbers
6. https://www.dataforindia.com/fertility/
7. https://www.shankariasparliament.com/current-affairs/regional-variation-of-tfr
8. https://www.geocurrents.info/blog/2025/01/11/regional-demographic-convergence-in-india-as-the-country-slips-below-the-replacement-rate/
9. https://casi.sas.upenn.edu/iit/data-for-india-rukmini-2025-part-two