Heart defects are especially common when pregnant mothers are exposed to a teratogen during which prenatal period?
A) the germinal period
B) the embryonic period
C) the fetal period
D) the last two weeks before birth

Question

Quizplus · Accepted Answer

During the embryonic period, which is roughly weeks 3-8 of pregnancy, the major organs and body systems are forming. If the fetus is exposed to teratogens during this time, it can cause significant developmental abnormalities, including heart defects.

Heart Defects Are Especially Common When Pregnant Mothers Are Exposed