During which prenatal stage does exposure to teratogens pose the greatest risk to the development of major organ systems and structures?

Question

Quizplus · Accepted Answer

During the embryonic stage, which occurs from the 3rd to the 8th week after conception, the basic structures of the body are formed. This period is when the developing organism is most vulnerable to damage from external factors, including teratogens, because the major organ systems are being established.

During Which Prenatal Stage Does Exposure to Teratogens Pose the Greatest