psychslides[3] - Prenatal Development The Miracle of Life...

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Prenatal Development Prenatal Development
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The Miracle of Life From Beginning To Babyhood
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Prenatal Development Period of time in which development occurs in the uterus before birth In humans it’s 38 + 2 weeks Begins with conception Male sperm fertilizes female egg w/in 24 hours after intercourse This becomes a single cell called the Zygote
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3 Stages of Prenatal Development Stage 1: Germinal Stage 1st 2 weeks after conception The zygote is the original single cell This cell has 46 chromosomes (1/2 mom/dad) It splits into 2 identical cells w/46 chromosomes in each one Each cell then splits into two more, etc
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The Zygote splits into two identical cells
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The Zygote splits into 4 identical cells
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The Zygote splits into 8 identical cells
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Stage 1: Germinal Stage (contd) These cells rapidly divide into a mass of cells called a Blastocyte The Blastocyte travels down the Fallopian tubes to the uterus where 58% are successfuly implanted by 10th to 12th day
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A Blastocyte implanting in the Uterine wall
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This note was uploaded on 03/26/2008 for the course PSYCHOLOGY 230 taught by Professor Phillips during the Spring '08 term at Iowa State.

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psychslides[3] - Prenatal Development The Miracle of Life...

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