What are the four broad stages of life?
What are the two main themes when looking at human development? Define development
Define prenatal development
From conception to birth. Rapid period of development that tapers off in weeks before birth
What are the three stages of prenatal development? How long do they last?
Give a high level overview of the germinal stage. What process occurs?
At what point do most pregnancies end before the woman notices?
germinal stage. Very delicate
Give a high level overview of the embryonic stage
When are damage/disruptions most damaging? What is one factor for miscarriages?
Embryonic stage: most miscarriages, birth defects, genetic abnormalities (which will be expelled as miscarriages)
Give a high level overview of the fetal stage
Skeleton hardens, capable of physical movement
What is the age of viability?
minimum age of development that a fetus can survive premature birth (22-26 weeks)
-slim chances at 22 weeks, increases to 67% at 25w
Give a high level overview of how sex is determined. When during this is sex determined?
Egg: x C
Sperm X or Y C
Sexless until week 6.
2nd half of week six: hormonal changes in Y C, can become male
What is SRY and how does it determine sex? How can it backfire?
Sex-determining Region of Y (C): when activated will make XY (male). Sometimes misfires, so born a female with XY C
What will a woman with XY chromosomes be like?
Outwardly female, but will be sterile. Only detectable in puberty (and only through testing)
Why does schizophrenia have a higher rate among men?
SRY involved in dopamine creation which is linked to schizophrenia
Can you detect chromosomes through ultra sound?
No. Have to tell via genitals
What are teratogens ?
Any external agents that harm a fetus
What impacts do maternal heroine and cocaine use have on babies?
H: outright addiction
C: birth complications and cognitive defects
What are some effects of FASD, and how many does it effect? List 5
1/9 babies!
What’s an additional concern with measuring FASD?
No safe amount of alcohol. So, many are effected but don’t quite meet criteria
What two impacts can smoking have on prenatal development?
2. Also conduct problems later on
What 3 complications can maternal malnutrition cause? What disorder can it cause?
What makes malnutrition hard to measure impact?
Impact is often compounded with drugs, lack of health care because of poverty.
Why is stress dangerous, what 3 troubles might it cause?
Because increases hormonal imbalance in moms, causes:
What are the main diseases that can impact pregnancies?
measles, syphellus, chickenpox, rubella, AIDS