People with Down syndrome typically experience mild to moderate intellectual disabilities, with adult mental ages often resembling that of an 8- or 9-year-old child, though this varies widely, with IQs averaging around 50. While cognitive abilities plateau, individuals with Down syndrome often have strong social-emotional skills, but face greater challenges in language (especially expressive) and certain cognitive areas like mental rotation, compared to typically developing peers of the same mental age, according to studies cited by National Institutes of Health (NIH) and the National Institutes of Health (NIH).
Children and adults with Down syndrome experience all the same emotions everyone experiences, both good and bad. They also experience mental health disorders including depression, anxiety, obsessive-compulsive disorder, and others.
The life expectancy for people with Down syndrome has dramatically increased, now averaging around 60 years, a significant rise from just 25 years in the 1980s, thanks to improved medical care, early interventions, and better support systems, allowing many to live healthy, active lives into their 60s, 70s, and beyond. However, this can vary, with some research highlighting disparities in life expectancy, especially across different racial groups, and noting increased risks for certain age-related health issues.
Down syndrome is a lifelong condition, and there isn't a cure. Symptoms of the condition are manageable, and treatment is available for any associated conditions that may arise.
Down syndrome is a genetic condition caused when an unusual cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome. The term "syndrome" refers to a set of symptoms that tend to happen together.
The intelligence quotient (IQ) among children with Down syndrome varies but averages about 50, compared with children in the general population, whose average IQ is 100. Children with Down syndrome often have delays in developing motor and language skills, but this is variable.
Yes. A woman with Down's syndrome can have children. If her partner does not have Down's syndrome, the theoretical chance of the child having Down's syndrome is 50%. There have been only a few reports of men with Down's syndrome fathering children.
Down Syndrome Statistics by Country in 2025
Ireland – Ireland has the highest number of babies with Down syndrome, 27.5 out of 10,000 born there. Ireland has more children born with Down syndrome than other countries due to factors like older mothers, fewer prenatal screenings, cultural and ethical values.
Although Down syndrome cannot be prevented, the latest medical advances include screening tests which can estimate the chance that a baby may have Down syndrome. “World Down Syndrome Day” is a global awareness day that is annually observed on March 21.
Of the people with Down syndrome in the United States: 67% are non-Hispanic and White, 13% non-Hispanic and Black, 16% Hispanic, 3% Asian or Pacific Islander, and 1% American Indian or American Native.
Alzheimer's disease associated with Down syndrome: a genetic form of dementia. Adults with Down syndrome develop the neuropathological hallmarks of Alzheimer's disease and are at very high risk of developing early-onset dementia, which is now the leading cause of death in this population.
People with Down syndrome will enjoy a long, happy and healthy life with an average life expectancy of 60 years of age. There are some common health issues and some more serious medical conditions that are more likely to occur in people with Down syndrome than in other people.
People with Down syndrome will typically have some level of learning disability and characteristic physical features. There are some health problems associated with Down syndrome, such as heart problems and difficulties with sight and hearing, but these will not affect everyone with the condition.
Children can also use self-talk to think out loud and process emotions. You may hear a child with Down syndrome talking to his or herself as they process their daily events. Children may use self-talk for entertainment.
Age is the only factor that has been linked to an increased chance of having a baby with Down syndrome resulting from nondisjunction or mosaicism. However, due to higher birth rates in younger women, 51% of children with Down syndrome are born to women under 35 years of age. (De Graaf et al., 2022).
Most individuals with Down syndrome have mild (IQ: 50–69) or moderate (IQ: 35–50) intellectual disability with some cases having severe (IQ: 20–35) difficulties. Those with mosaic Down syndrome typically have IQ scores 10–30 points higher than that.
ALSO, YES. Provided they're of legal age, there's no inherent reason an individual with Down syndrome can't consume alcohol. If people with Down syndrome don't drink alcohol, it's likely due to other factors rather than the condition itself. Yet, the myth persists.
Zack Gottsagen: Actor & Oscar Presenter
Zack starred in the critically acclaimed film The Peanut Butter Falcon alongside Shia LaBeouf and Dakota Johnson. In 2020, he also became the first person with Down syndrome to present at the Oscars.
They'll be eating, sleeping, crying, and needing love and cuddles just like all babies. Some babies with Down's syndrome might need extra help. This could be with things like feeding. There's support available for whatever you or your baby needs.
Visual acuity (clearness of vision) is poorer in all people who have Down's syndrome. Over half of people who have Down's syndrome need to wear glasses but EVERYONE who has Down's syndrome has poor visual acuity.
While females with Down syndrome are reported to be fertile or subfertile, males are reported to be infertile. To date, there are reports of three pregnancies that were fathered by two male Down syndrome patients (1, 2). We report a case of a nonmosaic Down syndrome male who fathered a normal child.
Previous studies have shown that people with DS are able to comprehend and respond reliably to carefully constructed questions about their self-perceptions [Begley, 1999].
Although women older than 35 years of age make up a small portion of all births6 in the United States each year, about one half of babies with Down syndrome are born to women in this age group. This likelihood increases as age increases.