The University of São Paulo Twin Panel: Current Status and Prospects for Brazilian Twin Studies in Behavioral Research.

The University of Sao Paulo Twin Panel (Painel USP de Gemeos), based at the Institute of Psychology of the University of Sao Paulo, started formally in 2017. Our registry is new, but in only two years of formal existence, it comprises a volunteer sample of 4826 registered individuals (98% twins and 2% higher-order multiples), recruited at the University of Sao Paulo and by social media campaigns. Our main aim is to conduct and promote research with twins on psychological processes and behavior. The University of Sao Paulo is the largest higher education and research institution in South America, and the Painel USP de Gemeos has great potential for fostering research on twin-related issues from a psychological perspective in Brazil and South America.