A "sleeper effect" is said to occur when a teratogen

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A "sleeper effect" refers to the delayed onset of developmental problems that may not be apparent at birth or during early childhood, but become evident later on. Teratogens are substances that can cause birth defects or developmental abnormalities in embryos or fetuses. The effects of a teratogen can be immediate or delayed, and may not become apparent until after a child is born or reaches a certain age. One example of a teratogen that can cause a sleeper effect is alcohol, which can cause fetal alcohol syndrome (FAS) in newborn babies, but may also contribute to developmental problems such as learning difficulties and behavioral issues later on.

A "Sleeper Effect" Is Said to Occur When a Teratogen