🟢 Strong Evidence
The World Health Organization has released a major policy report calling on countries to expand newborn screening programmes for birth defects, citing evidence that early detection and treatment can prevent millions of cases of lifelong disability. The report, Strengthening capacity for newborn screening, diagnosis and management of birth defects, identifies newborn screening as a critical intervention to reduce child mortality and improve health outcomes across low- and middle-income countries.
Key takeaways
- An estimated 8 million babies are born with a birth defect each year globally, accounting for almost 8% of all deaths in children under five
- Birth defect-related mortality among children under five has increased from 1% to 4% in sub-Saharan Africa and from 3% to 11% in South Asia between 2000 and 2023
- Approximately 90% of children born with serious birth defects live in low- and middle-income countries where screening access remains severely limited
- Conditions including congenital hypothyroidism, sickle-cell disease, and hearing impairment can be successfully managed if detected early after birth
Birth defect mortality rising sharply in low-income regions
Proportion of under-five deaths attributable to birth defects, 2000–2023
Source: WHO global health data, 2026 | Georgian Medical Journal News
A preventable crisis in low-income countries
The disparity in screening capacity between high-income and low-income nations is stark. Some countries screen all newborns for more than 50 congenital conditions, while many others cannot screen for any condition, according to the WHO report. This gap translates directly into preventable mortality: an estimated 90% of children born with serious birth defects live in low- and middle-income countries, where diagnostic and treatment infrastructure remains limited.
Dr Tedros Adhanom Ghebreyesus, WHO Director-General, stated in the June 2026 announcement that “around the world, countries are showing that newborn screening for one or more conditions can save lives, prevent disability, and give a newborn the best opportunity to fulfil her or his potential.” The WHO’s position reflects growing evidence that screening programmes represent a cost-effective public health intervention in resource-limited settings.
Rising burden: birth defects becoming leading cause of child death
Birth defects have shifted from a marginal to a major contributor to child mortality. Between 2000 and 2023, the proportion of under-five deaths attributable to birth defects increased from 1% to 4% in sub-Saharan Africa and from 3% to 11% in South Asia, according to WHO global health statistics. This trend reflects both a genuine increase in relative burden (as other causes of childhood death decline) and persistent gaps in detection and early intervention.
The rise is particularly pronounced in regions experiencing epidemiological transition, where infectious diseases have been controlled but access to perinatal screening remains underdeveloped. Conditions such as congenital hypothyroidism, sickle-cell disease, hearing impairment, and inherited metabolic disorders can all be successfully managed through early detection and timely treatment, yet millions of affected children are diagnosed too late—or not at all.
Screening as a pathway to universal health coverage
The WHO report recommends that countries begin newborn screening by identifying and prioritising one or more high-burden conditions relevant to their epidemiological context, then progressively expand capacity as resources and technical expertise grow. This graduated approach acknowledges the reality of health system constraints in low-income settings while establishing a foundation for eventual universal coverage.
Early detection of congenital hypothyroidism, for example, prevents intellectual disability and developmental delay if treatment begins within the first two weeks of life. Sickle-cell disease screening enables prophylactic penicillin and parental education that reduce mortality by up to 90% in some cohorts. Hearing screening in newborns allows for early intervention that prevents speech and language delays—outcomes with lifelong implications for education and employment.
Birth defects now account for almost 8% of all deaths among children under five globally, with the burden concentrated in low- and middle-income countries where screening infrastructure is severely limited.
— WHO, Strengthening capacity for newborn screening, diagnosis and management of birth defects (June 2026)
What this means
Frequently asked questions
Why is newborn screening important if the condition cannot be cured?
Many birth defects are not curable, but early detection enables early management that prevents the worst outcomes. Congenital hypothyroidism causes intellectual disability if untreated, but thyroid replacement therapy (initiated within days of birth) allows normal development. Similarly, early hearing screening allows deaf and hard-of-hearing infants to access sign language, hearing aids, or cochlear implants during the critical window for language acquisition.
What is the cost of implementing a newborn screening programme?
Costs vary by country and conditions screened. WHO recommends starting with one or two high-burden, treatable conditions—a more affordable entry point than screening 50 conditions at once. The economic case is strong: preventing one case of congenital hypothyroidism-related intellectual disability saves decades of custodial care costs. Health economic analyses from several middle-income countries have shown newborn screening to be cost-effective by standard thresholds.
Which birth defects should countries prioritize for screening?
WHO’s framework recommends that each country select priority conditions based on local burden (prevalence), availability of effective treatment, and laboratory capacity. Common starter conditions include congenital hypothyroidism, sickle-cell disease (in high-prevalence regions), G6PD deficiency, and hearing impairment. WHO provides technical guidance on epidemiological assessment to support this decision.
The WHO’s 2026 call to scale up newborn screening represents recognition that millions of preventable cases of childhood disability and death persist due to systemic gaps in health infrastructure. As maternal and newborn health systems mature globally, newborn screening must become a standard element of universal health coverage. Countries that act now to build screening capacity will see rapid returns in child survival and lifelong health outcomes—and WHO’s report provides both the evidence base and the implementation roadmap to make this possible.
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