InfantChildClass+9.13b.ppt

InfantChildClass+9.13b.ppt - Prenatal Development...

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Prenatal Development Conception to Birth Influences on Prenatal Development Birth The Newborn
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Theories of Child Development In the beginning… Aristotle (4th century B.C.) How does life begin? His answer: Epigenesis epigenesis - the emergence of new structures and functions in the course of development Ex. fertilized chicken eggs Modern day thoughts… Let’s study physical and behavior development in the womb embryology - the scientific study of prenatal development in the womb
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Conception Gametes egg and sperm contain half of the chromosomes present in all other cells almost all the eggs a female will have are formed during her own prenatal development men produce vast numbers of new sperm continuously
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Conception Did you know… the egg is the largest cell in the human body every ejaculation carries as many as 500 million sperm and only about 200 ever get near the egg sperm must travel for at least 6 hrs, approximately 6-7 inches to reach the fallopian tubes where conception takes place
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Conception- Is it a boy or is it a girl? Round 1: The Amazing Race… the sperm determines the sex sperm possessing a Y chromosome (genetic makeup for a boy) are lighter and swim faster about 120-150 males : 100 females Round 2: Survivor… about 106 males : 100 females - what happened? miscarriages are higher with males birth is more challenging - 50% result in Cesarean delivery tend to suffer disproportionately from developmental disorders Round 3: Audience Participation… boys are more highly valued over females in some cultures
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InfantChildClass+9.13b.ppt - Prenatal Development...

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