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Summary 1.5C Developmental Psychology: Changing man $6.92
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Summary 1.5C Developmental Psychology: Changing man

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  • April 1, 2023
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Notes Developmental Psychology: 1.5C Changing man

1.5.1 The birds and the bees

Prenatal Development:

 38 weeks/ 9 months

1. zygote 2. embryo 3. foetus

Pregnancy stages:

Difference between the trimester and the stages :

Stages are about the development of the baby. And the trimester are about the

The zygote:

The 1st pregnancy stage :

 Germinal/ Zygote period, first 2 weeks after conception, the zygote is created and
implanted in the wall of the uterus . In the first week blastocysts (inner cells) turn into
an embryo and trophoblast (outer cells) support the embryo

Germinal Stage: zygote formed by fertilization

finished zygote implanted in wall uterus (7days)

zygote: developing organism after sperm and egg united ( 2nd week)

→ rapid cell division

Tendrils - stems that connect with the blood vessels between the mother and the fetus

The Embryo: embryonic stage: 2nd- 8 weeks

The 2st pregnancy stage

 Embryonic stage . Starts when the zygote is firmly attached to the mother’s uterus.
From week 3 - week 8 ( most important for the fetus development ). The organs ,
placenta , umbilical cord develop and the heart starts to pulsate . Period where most
miscarriages occur 25%.

gestation: carry embryo/foetus during pregnancy

embryo: developing organism → major physiological structures

amniotic sac: membrane around embryo

,placenta: formed by cells → protect and sustain life

umbilical cord: tube contain blood vessel and connect growing baby and mother → oxygen
and nutrient and remove waste

When is a baby highest chance of survival : 42 weeks > after 52 weeks

Gender can be determined during three months

The first Trimester ( 1st and 2nd pregnancy stage )




 highest miscarriage in first 6 weeks
 detached wall uterus in first few weeks

The foetus: 3 month to delivery

The second trimester (3d pregnancy stage until birth)

The 3d pregnancy stage

The fetal stage. At the end of the 4th month all of the major organs and the sweat glands (5th
month) are developed . By the 6th month the baby can open its eyes. The stage of liability, if
the baby is born prematurely, it has a chance of survival.

bodily structures and systems

muscles and CNS

age of viability: 22-26 weeks able to survive- >physical systems advanced

Risks in prenatal environment:

teratogen: most threatening in embryonic stage

each organ different highest vulnerability

maternal and foetal genotypes affect response teratogen and determine abnormalities

An agent that potentially causes a birth effect.

Every fetus is exposed to a few of them.

Difficult to know .

,Teratogens cause the most problems in the embryonic stage




-different teratogens can produce same effect

the longer fetus exposed→ higher intensity and more likely harmed

Environmental dangers: (il)legal drugs:

aspirin→ low birth weight, lower IQ, poor motor control

smoking and drinking→ disturbance placental functioning

oxygen deprivation→ change foetus brain

passive smoke→ Higher risk variety of illness , delay intellectual

foetal alcohol syndrome: mental retardation , physiological abnormalities, 20% shorter,
abnorma behavior

men drink→ genetic damage

maternal cocaine→ physical and behavioral problems → brain hamerrohages. and neuron
damage, crying, depressed and unresponsive behavior

-depend on environment

mother addict→ child withdrawal symptoms → irritability and less able regulate arousal

Environmental toxins: automobile fumes water industrail waste → brain damage, low birth
weight

radiation, gases→ chromosomal abnormalities, lower fertility

aspirirn→ blood disorders

Radiation, Toxic waste - (mental retardation)

Characteristics of the mother:

 The health of the fetus depends on the mothers diet, emotional states and age.

Age: first child over 35→ more complication→ Down syndrome and illness

teenage mother→ risky environment, neglect health and diet, use drug and higher risk
premature and low birth weight babies

fertility declines after 27

, diet: malnourishment→ miscarriage, low weight, physical and neural defects , smaller and
cognitive difficulties

Emotional state: stressed→ troubled pregnancies, miscarriage, delivery complication,
hyperactive, irritable, sleep and feeding problems

Characteristics of the Father:

Age: men less fertile and declining quality sperm

Diet: coffee and smoking→ negative impact sperm quality, Zinc pos.

 The exposure to radiation of pesticides can influence his sperm and cause

Psychoactive drugs

 Alter your nervous system
 Most common effect on the embryo after the baby is born : Low birth weight,
miscarriages or stillbirth and blindness.
 90% of all women are exposed to drugs during their pregnancy

Nicotine

Causes pretime and low eight births. Respiratory and cardiovascular problems. Also causes
ADHD.

Alcohol

(FAS) structural defects of the child (shorter head etc), low weight and mental retardation
(due to oxygen shortage )

Cocaine

Reduced birth weight. Lower reflexes and slower growth rate****

Heroin : Mothers that use opiates during pregnancy, the chance that the baby is born
withdrawal symptoms (tremors) is higher . Not sure if the effects are due to drugs. If the
mother stops using drugs before the fetal stage the baby is less affected

Caffeine

If a mother consumes to much (>200 mg) a day this can lead to a miscarriage.

Marijuana

Resulted in Lower IQ.

Antidepressants

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