Critical periods are times when the environment can influence the development of the embryo.

Question

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During critical periods, environmental factors can have a significant impact on the development of the embryo, which can have long-term effects on growth, behavior and health. Examples of critical periods include the first trimester of pregnancy, when the major organs and structures are formed, and early childhood, when the brain is rapidly developing.

Critical Periods Are Times When the Environment Can Influence the Development