What is an example of a teratogenesis?

An example of teratogenesis is the effects of thalidomide, a medication that was prescribed in the late 1950s and early 1960s to pregnant women for morning sickness. It led to severe birth defects, including limb malformations and organ abnormalities in newborns. This incident highlighted the critical importance of evaluating drug safety during pregnancy and contributed to stricter regulations for pharmaceutical testing.