
While most people have 23 pairs of chromosomes (46 chromosomes in total) that make up their cells and DNA, some individuals are formed in the womb with an extra copy of a chromosome, for a total of 47. This additional chromosome causes a condition called trisomy, a word that comes from Greek meaning “tri” for three, and “somy” meaning chromosome, indicating an extra in what is meant to be a pair.
Trisomy conditions may create a wide range of health issues impacting the physical health as well as causing cognitive issues.
The most commonly known form of this condition is Trisomy 21, also called Down Syndrome. Trisomy Awareness Month exists to increase public knowledge and understanding about trisomy conditions, educating and promoting community support for individuals and families affected by trisomy.
How to Celebrate Trisomy Awareness Month
Get involved and show support to those in the community affected by trisomy by observing Trisomy Awareness Month, starting with some of these ideas:
Learn More About Trisomy Conditions
Individuals, families, communities, schools, and others can get more involved with Trisomy Awareness Month by becoming more informed and educated about some of the factors related to trisomy conditions.
Do some research at the local library or get started with some information here:
Trisomy 21 (Down Syndrome) affects around 1 in 800 births in the US each year, often resulting in a range of physical health issues and comorbid conditions as well as developmental disability
Trisomy 18 (Edwards Syndrome) is a rare condition that results in low birth weight, and slow growth and is often life-threatening
Trisomy 13 (Patau Syndrome) is extremely rare and most often causes fatalities in babies
Raise Awareness About Trisomy
An excellent way to get involved with Trisomy Awareness Month is to learn more – and then share – about this genetic condition that affects hundreds of thousands of families across the nation.
Make a post on social media to encourage others to get involved with supporting and caring for those families affected by trisomy who may need help with certain needs.
Support a Trisomy Organization
A great way to get involved with Trisomy Awareness Month, whether personally impacted by the condition or simply desiring to do more to support this community, would be to act in support of a non-profit organization.
This might be volunteering in a local community center, helping out with fundraising or making a donation personally.
A few of the organizations that are connected with trisomy support include:
- The Trisomy 18 Foundation
- Support Organization for Trisomy (SOFT)
- National Down Syndrome Society
- Hope for Trisomy 13 and 18
History of Trisomy Awareness Month
Trisomy Awareness Month has been celebrated for over a decade, since its inaugural celebration in 2013. The event was chosen to take place in March as a nod to the “tri” in trisomy, because March is the third month of the year.
By 2014, Trisomy Awareness Month grew in scope, with the National Institutes of Child Health and Development getting involved, along with a range of other organizations. The event not only raises awareness about trisomy conditions, but it also encourages more community involvement about the support that families impacted by trisomy might need.
You may also like

Rare Chromosome Disorder Awareness Day
Highlighting unique genetic variations, fostering understanding and support — a celebration of diversity in the genomic tapestry of life.
- United Kingdom

KBG Syndrome Awareness Day
Discover the story of KBG Syndrome Awareness Day, raising understanding of this ultra-rare genetic disorder and supporting affected individuals and families.

World Down Syndrome Day
Embrace the resilience and unique beauty that shines brightly within individuals who possess an extra chromosome, fostering compassion and understanding.
- International

Bohring-Opitz Syndrome Day
Bohring‑Opitz syndrome is a rare genetic disorder caused by a new mutation in the ASXL1 gene. It brings together many complex challenges. Children tend to have distinctive facial features, joint stiffness in their arms, and a small head size. They often struggle with feeding, growth, breathing, sleep apnea, and frequent lung...
- Australia
- Canada
- Netherlands
- and 2 more
National days and holidays on March 1 2027

World Seagrass Day
World Seagrass Day is a worldwide reminder that some of the planet’s most important landscapes are the ones most people never see. Beneath calm, shallow coastal waters, underwater meadows quietly perform outsized work: feeding marine life, clearing the water, buffering shorelines, and locking away carbon for the long haul. World Seagrass...
- Australia
- International
- United Kingdom
- and 1 more

Zero Discrimination Day
Imagine a world where everyone is free to be themselves without fear of being judged or treated unfairly. Sounds amazing, right? Zero Discrimination Day points toward that world by encouraging people to notice where bias shows up, learn what dignity looks like in everyday life, and take practical steps that...
- Canada
- India
- International
- and 3 more

National Horse Protection Day
Giving a second chance to majestic creatures that were once overlooked and neglected is both rewarding and inspiring.
- Australia
- Canada
- United Kingdom
- and 1 more

Baba Marta Day
Baba Marta Day, celebrated in Bulgaria, is a lively and colorful tradition that marks the transition from winter to spring. People exchange and wear red and white bracelets called martenitsas. These simple yet meaningful tokens symbolize good health, happiness, and the hope for a fruitful year ahead. The festive spirit fills...
- Bulgaria
- Greece
- North Macedonia
- and 2 more
Seize Every Day
Join free for personalised recommendations, email reminders and exclusive guides. Never miss a day.



