Teratogens and prenatal infections included in “T” and where observed defects are strongly associated with the teratogen
| Drugs |
| Abortifacients |
| ACE inhibitors |
| Alcohol |
| Anti-epileptics |
| Cocaine and other illicit drugs |
| Cytotoxics |
| Diabetes, poorly controlled |
| Folic acid inhibitors |
| Lithium |
| Severe maternal illness |
| Thalidomide |
| Vitamin A analogues |
| Warfarin |
| Infections |
| Cytomegalovirus |
| Herpes simplex |
| Parvovirus |
| Rubella |
| Toxoplasmosis |
| Varicella |