Exposure to toxins during the 12th week of a pregnancy would be most likely to result in defects in which of the body's organs?
A) the brain
B) the ears
C) the heart
D) the genitalia (sex organs)

Question

Quizplus · Accepted Answer

As shown on the chart on page 75 of the text, external genitalia are susceptible to teratogens during the 12th week of pregnancy. The heart and ears are susceptible earlier, and the brain is susceptible later.

Exposure to Toxins During the 12th Week of a Pregnancy