The Stanford Twin Registry

The ITI Twin Research Registry at Stanford University School of Medicine is a community-based registry of twins established in 1995 by Dr. Gary Swan at SRI.

Twins hold a special place in science as a source of insight into human behavior and genetic links. SRI established the Registry as part of its research and efforts to discover more about human behavior. Fraternal and identical twins and multiples of all ages are invited to join the Registry for consideration for research studies.

Registry members participate in studies focusing on the pharmacokinetics of nicotine, metabolism of commonly used medications, genetic susceptibility to cancer-causing chemicals, and sleep patterns in young twins.