Skip to main content
Thursday, October 29, 2026Oct 29

This story is free to read.

Database launched to gather, study DNA from Midwestern twins

SIOUX FALLS, S.D. (AP) – Researchers who study how genes and the environment influence people’s health are hoping that twins who live in the Midwest will contribute DNA to a new database that might provide insight about traits and diseases specific to the region.

The database, known as a twin register, was launched Wednesday by Sioux Falls-based Avera Health. It is seeking DNA samples from identical and fraternal twins of all ages in the Midwest, primarily in the Great Plains, and it comes after the health system processed thousands of samples belonging to twins from the Netherlands through a collaboration with researchers in that country.

“Why does one twin get a disease and the other doesn’t? That’s what we are studying. We look at both the genetics and environmental influences on diseases such as type 1 diabetes, behavioral disorders and cardiovascular disease,” said Gareth Davies, chief scientific officer at the Avera Institute for Human Genetics.

The health system believes the database could potentially allow for more accurate diagnoses, development of better treatment and prevention of diseases. The DNA of the participants will be analyzed by researchers, but the individuals won’t receive any additional care or compensation. A couple that has begun the process of enrolling their 16-month-old identical twins believes the potential of contributing to a breakthrough in science is enough motivation to participate.

“We already have them and it doesn’t hurt them, so, why not help the research?” said Sioux Falls resident Craig McCarthy, dad to Kamper and Sayers. McCarthy said he knows the parents of other twins and would recommend they participate as well.