Exposure to teratogens during __________ is most likely to produce major defects in bodily structure.

Question

Quizplus · Accepted Answer

The period of the embryo is the time when major bodily structures are developing, so exposure to teratogens during this time is most likely to produce major defects. The period of the zygote is the earliest stage of development, and it is unlikely that teratogens would have a significant impact during this period. The period of the fetus is when the fetus is growing and maturing, but the major organs and structures have already formed by this point. Conception (fertilization) is not a developmental period, but rather the starting point for development.

Exposure to Teratogens During __________ Is Most Likely to Produce