General
- Alliance of Genetic Support Groups
- Centers for Disease Control and Prevention (CDC)
- Congenital Malformations Browser
- Gene Reviews
- Global Birth Defects
- IBIS: International Birth Defects Information systems
- March of Dimes
- National Institutes of Health – Genetic and Rare Diseases Information Center
- National Organization for Rare Disorders
- Online Mendelian Inheritance in Man (OMIM)
- Orphanet
- World Health Organization (WHO)
Epidemiology and Registries
- Argentina: Red Nacional de Anomalías Congénitas de Argentina (RENAC-Ar)
- Australia: National Perinatal Epidemiology and Statistics Unit (NPESU)
- Australia: Western Australia Register of Developmental Anomalies (WARDA)
- Canada: Canadian Congenital Anomalies Surveillance Network (CCASN)
- Canada: Alberta Congenital Anomalies Surveillance System (ACASS)
- Costa Rica: Centro de Registro de Malformaciones Congénitas (CREC)
- Colombia: Programa de Vigilancia de Bogotà y Cali
- Czech Republic: Congenital Anomalies in Czech Republic
- Germany: Fehlbildungsmonitoring Sachsen-Anhalt
- Iran: TROCA – Tabriz Registry of Congenital Anomalies (TROCA)
- Italy: Registro Toscano Difetti Congeniti
- Latin America: Estudio Colaborativo Latino Americano de Malformaciones Congénitas (ECLAMC)
- Spain: Estudio Colaborativo Español de Malformaciones Congénitas (ECEMC
- The Netherlands: Eurocat Northern Netherlands
- United Kingdom: British Isles Network of Congenital Anomaly Registers (BINOCAR)
- United States: Texas Birth Defects Registry
- United States: Utah Birth Defect Network
- Wales: Congenital Anomaly Register & Information Service (CARIS)
