At Which Stage is the Human Embryo Most Susceptible to Toxic

Question

At which stage is the human embryo most susceptible to toxic substances?
A) During organogenesis
B) Just before birth
C) During the last trimester
D) During cleavage
E) During the fourth and fifth months

Accepted Answer

During organogenesis, which occurs in the first trimester, the basic structures of the organs are formed, making the embryo highly susceptible to toxic substances.