Children's health

7 things you should know about Down syndrome

About 1 in every 700 babies in the US is born with this chromosomal disorder every year.


LearnGenetic conditionsChromosomal disorders7 things you should know about Down syndrome
Pregnant women have screening options
There are diagnostic testing options, too
Lifestyle changes will not lower the risk of Down syndrome
Certain features are characteristic to downs
There are different types of Down syndrome
There’s an increased risk of other conditions
A diagnosis can make a family stronger

1 of 8

Every year, nearly 6,000 new babies are diagnosed with Down syndrome, the most common type of chromosomal disorder. And although it can cause many developmental challenges, life expectancy for people with the condition has leapt from 25 years old in 1983 to 60 today.

What is Down syndrome? Typically, a baby is born with 46 chromosomes, or “packages” of genes. In the most common form of Down syndrome, a baby has an extra duplicate, otherwise known as a “trisomy,” of chromosome 21. This affects their development, both mentally and physically; children with Down syndrome often have cognitive and communication impairments, as well as delays in motor skills, in addition to shorter necks and smaller ears, among other traits.

Whether you’re a soon-to-be-parent or you know someone with Down syndrome, here’s everything you need to know about symptoms, risk factors, screening options and more.

Written by Olivia DeLong.
Medically reviewed by Kevin Soden, MD, MPH.April, 2026
Updated onSeptember, 2026
Written by Olivia DeLong.
Medically reviewed by Kevin Soden, MD, MPH.April, 2026
Updated onSeptember, 2026
AskMDAskMD

Curious about Children's health?

Get instant answers from our AI health assistant

Ask Now

Recommended for you

Though genetics may drive many of the health concerns related to congenital differences, there are some things you can do during pregnancy to lower the risk.

9 ways to reduce the risk of congenital differences
Slideshow

Surgical deliveries account for about one-third of all births in the United States.

6 things to know about having a C-section
Slideshow

In the U.S., more than 19 million people are affected by depression.

What you need to know about depression
Article

Learn about the disease that affects one person in the United States every hour.

Must-know facts about multiple sclerosis
Article

Autism diagnoses continue to climb, in large part because we're getting better at recognizing the disorder.

How common is autism, really?
Article
AskMDHow can I be more consistent?
AskMD by Sharecare LogoAskMD by Sharecare Logo
Privacy policyConsumer health data privacyTerms of use
Cookie policyYour privacy choices

© 2026 Sharecare, Inc.

ask-mdask-md
AskMD by Sharecare LogoAskMD by Sharecare Logo
Privacy policyConsumer health data privacyTerms of use
Cookie policyYour privacy choices

© 2026 Sharecare, Inc.