What was the most critical lesson about teratogens learned from studies on the use of the drug diethylstilbestrol (DES) by pregnant women?
A) Sometimes what appear to be teratogens actually are harmless drugs.
B) Infants in the late fetal period appear to be the most at risk for impact from drug-related teratogens.
C) Sometimes the effects of teratogens are not apparent until long after exposure.
D) Females appear to be at much greater risk from teratogens.

Question

Quizplus · Accepted Answer

The critical lesson learned from the use of diethylstilbestrol (DES) by pregnant women is that sometimes the effects of teratogens are not apparent until long after exposure. DES was prescribed to prevent miscarriages, but it was later found to cause a rare form of vaginal cancer and other significant health issues in the daughters of women who took the drug during pregnancy, often years after their birth.

What Was the Most Critical Lesson About Teratogens Learned from Studies