ChildChapter4st - Chapter 4 Chapter PrenatalDevelopment...

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Chapter 4 Chapter 4 Prenatal Development  and Birth This multimedia product and its contents are protected under copyright law. The following are prohibited by law: •Any public performance or display, including transmission of any image over a network; •Preparation of any derivative work, including the extraction, in whole or in part, of any images; •Any rental, lease, or lending of the program.
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Overview Overview Germinal stage Conception to implantation Approximately 2 weeks Embryonic stage Implantation to 8 weeks Major organs and body systems develop Fetal stage 8 weeks to birth Elaboration of body systems and brain development
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Germinal Stage Germinal Stage Zygote Fertilized egg Timeline Cell division begins 24 hours post fertilization 2-3 days to reach uterus 12-16 cells  Implantation fully complete after 2 weeks Thousands of cells
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Ectopic Pregnancy Ectopic Pregnancy A pregnancy that occurs outside the uterus most commonly in fallopian tubes 1/100 pregnancies Results in abdominal pain and irregular bleeding Very dangerous
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The Embryonic Stage The Embryonic Stage Amnio Membrane which  grows over embryo  and fills with amniotic  fluid Protects embryo Chorion Membrane that grows  around embryo and  becomes the placenta  
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The Embryonic Stage The Embryonic Stage Placenta The structure through which nutrients are  exchanged Umbilical cord The lifeline of the embryo Consists of two arteries and one vein
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The Embryonic Stage The Embryonic Stage During embryonic  period, all major  systems form Thus, this is a time of  great vulnerability  
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Developmental Principles Developmental Principles Cephalocaudal development The principle that growth occurs from the  head downward Proximodistal development The principle that body parts closer to the  central axis of the body develop first
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This note was uploaded on 05/27/2011 for the course PSY 105 taught by Professor Hamilton during the Spring '11 term at Moraine Valley Community College.

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ChildChapter4st - Chapter 4 Chapter PrenatalDevelopment...

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