Australian men are choosing permanent contraception at record rates, with a major new study revealing a dramatic increase in vasectomy procedures as the nation’s fertility rate falls to its lowest level on record.

Researchers from the University of Adelaide found that the number of vasectomies performed on Australian men aged between 18 and 44 rose by more than 60 per cent over the past decade, increasing from 18,544 procedures in 2016 to 29,848 in 2024.

The study also identified a growing number of men aged 18 to 24 opting for the procedure, suggesting decisions about permanent contraception are increasingly being made much earlier in adulthood than in previous generations.

The findings come as Australia records its lowest-ever fertility rate, with the Australian Bureau of Statistics reporting that the national fertility rate fell to just 1.48 births per woman in 2024—well below the replacement level of around 2.1 births needed to maintain a stable population without migration.

Lead researcher Dr Jack Janetzki said the trend reflects broad social and economic changes rather than any single factor.

“Decisions about limiting fertility are increasingly being made earlier in adulthood,” Dr Janetzki said.

“For younger adults especially, housing affordability, job insecurity and the cost of raising children all shape those decisions.

“When buying a home feels out of reach, childcare is expensive and financial uncertainty persists, some couples choose to have smaller families or not have children at all.

“Birth rates underpin population growth, the age structure of our population and long-term economic sustainability, so sustained declines have consequences that extend well beyond individual families.”

The research analysed Medicare claims for vasectomy procedures alongside Australian Bureau of Statistics birth data between July 2015 and December 2024, allowing researchers to compare long-term changes in sterilisation rates with national fertility trends.

Although the study does not conclude that declining birth rates directly caused the increase in vasectomies, it found both trends have accelerated over the same period as Australians confront rising living costs and changing attitudes toward family planning.

Researchers identified several reasons why vasectomy has become increasingly common.

Economic pressures featured prominently, with the continuing cost-of-living crisis influencing decisions about whether to have children and, for those who do, how many children to have.

Housing affordability remains one of the biggest concerns for younger Australians. Escalating property prices and higher mortgage repayments have delayed home ownership for many couples, making long-term family planning more uncertain.

Childcare costs, which have risen significantly over the past decade despite government subsidies, were also identified as an important consideration for households weighing the financial implications of raising children.

Job insecurity and broader economic uncertainty have added further pressure, particularly among younger adults establishing careers while managing higher living expenses.

Beyond financial considerations, researchers say changing social attitudes have also played a significant role.

Vasectomy has become increasingly normalised within Australian society, with greater public awareness of the procedure and fewer cultural stigmas than existed in previous generations.

The study also points to growing expectations that men should share responsibility for long-term contraception rather than relying primarily on female contraceptive methods.

Compared with female sterilisation, vasectomy is generally regarded as a less invasive procedure, involving fewer surgical risks and a shorter recovery period.

A vasectomy works by cutting or sealing the vas deferens—the tubes that carry sperm from the testicles—preventing sperm from entering semen during ejaculation. The procedure does not affect testosterone production, sexual function or libido.

Most vasectomies are performed as day procedures under local anaesthetic and patients typically return home the same day, with recovery often taking only several days.

However, specialists emphasise that vasectomy should always be regarded as a permanent form of contraception.

Although reversal surgery is technically possible, success varies considerably depending on how much time has passed since the original procedure and other medical factors.

Dr Janetzki stressed that Australians considering the operation should fully understand its long-term implications.

“Vasectomy is intended to be a permanent form of contraception and reversals are neither simple nor 100% successful,” he said.

Medical organisations similarly advise patients not to undergo the procedure unless they are confident they do not wish to father children in the future.

The increase in younger men choosing vasectomy has attracted particular attention because permanent contraception has traditionally been most common among older men who have already completed their families.

The study suggests that social expectations surrounding parenthood are continuing to evolve, with more Australians viewing remaining child-free as an acceptable long-term lifestyle choice.

Researchers also warn that Australia’s declining fertility carries implications extending well beyond individual households.

Lower birth rates contribute to an ageing population, resulting in a smaller proportion of working-age Australians supporting a growing number of retirees.

Over time, this demographic shift can increase demand for healthcare, aged care and pension services while reducing workforce growth and placing additional pressure on government finances.

Successive Australian governments have attempted to address these challenges through a combination of family assistance payments, childcare reforms, parental leave policies and migration programs designed to supplement workforce growth.

Despite these initiatives, fertility rates have continued to trend downward, reflecting patterns observed across many developed economies including Canada, the United Kingdom, Japan, South Korea and much of Western Europe.

Demographers note that delaying parenthood has also become increasingly common as Australians spend longer in education, establish careers later and marry or form long-term relationships at older ages than previous generations.

While some couples ultimately have children later in life, others decide against parenthood altogether or choose to have fewer children than originally planned.

The University of Adelaide researchers say understanding the reasons behind these decisions is important for policymakers seeking to address Australia’s long-term demographic and economic challenges.

They emphasise that reproductive choices remain deeply personal decisions shaped by individual circumstances, financial security, relationship goals and broader social conditions.

As vasectomy becomes increasingly common among Australian men, health experts say ensuring access to accurate information remains essential so that individuals fully understand both the benefits and the permanence of the procedure before making what is often a lifelong decision.