Chapter 2 - Prenatal Development, infancy, early childhood

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Last updated 9:02 PM on 10/4/26
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13 Terms

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Beginning of Life

Cell—Nucleus—23 pair of chromosomes —- genes

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Genes

  • passed down fro generation to generation

  • we can inherit behaviors


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Almost every trait is…

  • Polygenic

  • Multifactorial


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Polygenic

combined activity of many genes

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multifactorial

influenced by many factors like the environment

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Prenatal Development Periods (3)

  1. Zygotic Period

  2. Embryonic Period

  3. Fetal Period


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Zygotic Period

  • 2 weeks after conception

  • rapid cell division and cell differentiation


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Embryonic Period

  • 3-8 weeks

  • forms all body structures develop


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Fetal Period

  • 9-40 weeks

  • fetus grows in size and matures in functions


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Prenatal Teratogens

an agent that causes abnormal prenatal development

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Alcohilism

  • partly genetic

  • Fetal Alcohol Syndrom (FAS)


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Fetal Brain

  • signals release of hormones to be born = labor begins


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Post-partum Depression

  • happens cause of body’s hormonal changes (8-15% of moms)

    • appetite changes

    • difficult concentration/confusion

    • no interest in baby

    • fear of harming baby

    • sleep changes

    • holessness

    • sadness

    • fatigue