The critical period of vulnerability is a period of time during which an embryo or fetus is vulnerable/to the effects of

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The critical period of vulnerability refers to a specific time during development when an embryo or fetus is most vulnerable to the negative effects of teratogens, which are substances or agents that can cause birth defects or fetal damage. Examples of teratogens include alcohol, drugs, certain medications, and environmental factors such as radiation exposure.

The Critical Period of Vulnerability Is a Period of Time