Teratogens and Mutagens

This is what I learned today at work from Shizzle:

"Teratogenesis is a medical term from the Greek, literally meaning monster-making, which derives from teratology, the study of the frequency, causation, and development of congenital malformations—misleadingly called birth defects. These include gross morphological abnormalities, such as cleft lip and/or palate, anencephaly, or ventricular septal defect, but may also include phenomena such as increased risk of cervical cancer or discoloration of tooth enamel. These malformations can arise from genetic abnormalities of the fetus, from adverse environmental circumstances (termed teratogens or tetragens), or, frequently, from an unlucky combination of these factors. Teratogenesis has gained a more specific usage for the development of abnormal cell masses during fetal growth (see pregnancy), causing physical defects in the fetus. The study of teratogenesis is called teratology." From Wikipedia, the free encyclopedia

Conversely:
From Wikipedia, the free encyclopedia

In biology, a mutagen (Latin, literally origin of change) is an agent that changes the genetic information (usually DNA) of an organism and thus increases the number of mutations above the natural background level.
Mutagens are usually chemical compounds or ionizing radiation.

In conclusion: mutagens can also be teratogens!

Now... give your head a shake! :)