TERIS - the Teratogen information system

An authoritative clinical teratology resource to assess risks of medication and other exposures during pregnancy. TERIS was established by Dr. Jan M. Friedman in 1986, and is governed by an advisory board of global authorities in clinical teratology from the fields of medicine, genetics and epidemiology.

TERIS was developed and hosted for over three decades at the University of Washington, a global leader in medical research and education. As of 2025, TERIS has been entrusted to PEAR-Net Society to continue its mission as an independent, nonprofit resource.

Shepard’s Catalog of Teratogenic Agents

A comprehensive reference that includes information on over 3,000 drugs, chemicals, infections, and other exposures, describing what is known about their potential to cause birth defects in humans or animals. It is an essential resource for researchers, clinicians, and policy-makers working in reproductive health and teratology. First published in print by Dr. Thomas H. Shepard in 1973, the Catalog has long been a trusted source in the field.