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  • Intro To Psych
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Summary Pre-Natal Development

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2022/2023 Written for academic year
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University Of The Witwatersrand (wits)
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Intro To Psych
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First Year notes on: Pre Natal Development Contain a comprehensive summary, illustrations (where applicable) and additional notes/resources related to the topic. Contains notes from: Psychology - An Introduction (Paperback, 4th ed) L. Swartz, C. De la Rey, N. Duncan, L Townsend, V. O'Neill

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Pre Natal Development
Created @April 21, 2022 11:42 AM

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Pre Natal Development

Pre natal development: from conception until childbirth


Conception: fertillisation of egg by sperm cell
Germinal stage: first period of pre natal development (0-2 weeks)

Zygote → one celled organism

Embryonic stage: (3-8 weeks)
Fetal stage: (9 weeks - birth)



Important to know about PND in psychological context →

h

j




The Germinal Stage
0-2 weeks

rapid cell division



Pre Natal Development 1

, zygote → mass of multiiplying cells → fallopian tube to uterine lining → implantation

Placenta forms




Embryonic Stage
2-8 weeks

Vital organs and bodily systems

vulnerable stage → foundations of body’s organs

neural tube → brain and spine

heart throbs → week 4

arms, legs, cornea → week 5

liver and spleen, blood cells, digestive and urinary system, neural linking →
ORGANOGENESIS - week 6-8




Foetal Stage
week 9 - birth

sex organs - month 3 and 4

foetus moves - month 4

eyes move, foetus breathes and cries - month 6

see, hear, smell, taste - month 7

Zone of Viability: weeks 22-26




Risks to Pre - Natal Development

Teratogens



Pre Natal Development 2

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  • development
  • prenatal
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