The establishment of the TRIXY Center of Expertise: the only nationally recognized center of expertise where psychological care and scientific research are combined for children, adolescents, and adults born with an extra X or Y chromosome. This can lead to various syndromes, each with specific characteristics. The team of scientists and clinicians at TRIXY ensures that important knowledge is gathered about the vulnerabilities associated with these syndromes, particularly in the areas of cognitive, emotional, and social development, and its translation into clinical practice.