Teratogens will have their most negative impact during this period __________
A) the first trimester.
B) the embryonic stage.
C) just following birth.
D) the second trimester.

Question

Quizplus · Accepted Answer

The embryonic stage, which occurs during the first eight weeks of pregnancy, is the period when organs and major body systems are formed. Therefore, exposure to teratogens during this time can have a significant negative impact on the developing fetus.

Teratogens Will Have Their Most Negative Impact During This Period