The period of the embryo
A) lasts for about two weeks.
B) is the period of the most rapid prenatal changes.
C) begins during the second trimester of pregnancy.
D) is the period when the developing organism is the least vulnerable.

Question

Quizplus · Accepted Answer

The period of the embryo lasts from the second to the eighth week of pregnancy, and it is characterized by the most rapid prenatal changes, including the development of major organs and systems in the body. This is also the period when the developing organism is most vulnerable to teratogens, or harmful agents that can cause birth defects.

The Period of the Embryo