A teratogen is best defined as
a. any medication taken during labor and delivery.
b. anything that can cross the placental barrier.
c. any drug, disease, or environmental agent that causes a birth defect.
d. a birth defect caused by genetic abnormalities.
Question 2
The idea of _____ is that environmental events during pregnancy may alter the expected genetic unfolding of the embryo/fetus or reset its physiologic functions.
a. maternal-fetal interaction
b. epigenesis
c. teratology
d. fetal programming