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Human Sexuality
Test 2 lecure 3
63
Physiology
Undergraduate 2
02/17/2010

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Term
World Abortion
Definition
80% in undeveloped countries
22 million illegal abortions/ 36 million legal
19 million unsafe abortions, almost all in undeveloped countries
Term
highest abortion rates
Definition
Romania, Cuba, Vietnam
Term
lowest abortion rates
Definition
netherlands, belgium, germany, switzerland
Term
access to legal abortion
Definition
40% allow abortion on demand
25% have restricted permission
35% sharply restrict
Netherlands has highest access
Term
Troubling practices
Definition
abortion as means of population control- China
abortion because no birth control
death from illegal abortion, abandonment and abuse of infants
Term
motivation for abortion
(preindustrial society)
Definition
health considerations
political causes
social structure
economic factors
family dynamics
Term
techniques of abortion
(preindustrial society)
Definition
herbal preparations
maneuvers- climbing, squeezing body, punching uterus
instrumentation- insertion of devices
external applications
weakening-starving, bleeding
magical rites
Term
U.S. abortion
Definition
1 million annually, steady decline since 1990
25% of pregnancies are aborted
33% of teenage pregnancies are aborted
60% occur in population seeking to avoid pregnancy with contraception
30% occur in population hoping to avoid pregnancy but don't use contraception
10% occur in population who initially wanted it but changed their mind
43% of females will have one abortion before age 45
50% of abortions occur prior to age 25
Term
reasons for abortion with intended pregnancy
Definition
fetal defects
maternal health
Term
reasons for abortion with unintended pregnancy
Definition
financial burden
immaturity
failed relationship
limit family size
rape
Term
zygote
Definition
days 0-4 PF
single fertilized cell replicates into a clump of undifferentiated cells (morula)
moves to uterus, begins to implant in the endometrium
Term
blastocyst
Definition
days 4-12 PF
hollow, fluid filled ball of 100 cells
outer layer (trophoblast) will form the fetal membranes (chorion and amnion)
inner cell mass with eventually form the embryo
Term
chorion
Definition
forms the chorionic villi which attach to the endometrium
villi begin to secrete HCG
eventually will form the umbilical cord and placenta
Term
organogenesis
Definition
embryo period
Term
weeks 3-8 PF (5-10 LMP)
Definition
first trimester of pregnancy
Term
week 3 PF
Definition
conceptus is 1/12 inch;
week 8 PF conceptus is 1 inch
Term
C-shaped hollow tube
Definition
3 layers develop into primitive organ systems
Term
ectoderm
Definition
nervous system and skin
Term
mesoderm
Definition
muscle, skeleton, reproductive and circulatory systems
Term
endoderm
Definition
digestive and respiratory systems
Term
nervous system
Definition
week 3 PF- forming hollow nerual tube
week 4 PF - spinal cord begins to form
week 5 PF- first neurons form
week 8 PF- first synapses form
Term
circulatory system
Definition
week 4 PF- primitive 2 chambered heart with contractions, no circulation
week 8 PF- 4 chambered heart with circulation
Term
motor system
Definition
week 5 PF - precursors of limbs emerge
week 6-7 PF - primitive reflexive limb movement, twitches
week 10 PF - extremities are formed
Term
other systems
Definition
week 5 PF - primitive facial features are evident, umbilical cord forms
week 6 PF - eyes and ears emerge
week 7 PF - gonads are formed
Term
organogenesis
Definition
end of embryo period rudiments of all systems are present with concurrent primitive function
Term
Fetal Period
Definition
2nd and 3rd trimester
Term
weeks 9-24 PF (10-26 LMP)
Definition
corresponds roughly to 2nd trimesters of pregnancy
Term
week 12 PF
Definition
conceptus is 4 inches, 2/3 ounce
week 24 PF - conceptus is 15 inches, 2.2 pounds
rapid development of structures and functions of major organ systems, dramatic increase in length
Term
nervous system
Definition
week 12 PF - beginning of differentiation of cortical and sub-cortical areas of the brain
week 24 PF - cycles between sleep and wakefulness are evident
week 24 PF - cortical localization of perceptual function begins to be established
Term
month 5 PF
Definition
detectable heart beat
Term
month 6 PF
Definition
responds to light, sound, engages in reflexive thumb sucking
Term
weeks 25-38 PF
Definition
corresponds roughly to 3rd trimester of pregnancy
Term
week 38 PF
Definition
conceptus is 20 inches, 7.5 pounds (full term birth)
fat deposits create energy storage
Term
maturation of nervous system
Definition
dramatic proliferation of synaptic connection between brain areas and spinal cord leading to cortical control of body functions and perception
Term
maturation of respiratory system
Definition
lungs prepare to extract oxygen from breathing air
Term
viability
Definition
ability to complete development outside the uterus using any/all medical technology
Term
week 24 PF
Definition
50-80% preterm babies srvive with extensive, intensive medical care
85% have high risk of mental retardation, blindness, serious medical problems
Term
NICU
Definition
used to develop babies postnatally in intensive care nursery
Term
cost of postnatal care for 24 week fetus
Definition
.5-1 million dollars
3+ month stay in NICU
Term
Rationale method to prevent implantation
Definition
remove endometrium preemptively
not legally abortion
Term
menstrual extraction
3-4 LMP
Definition
mechanical extraction of endometrium
used in anticipation of menses
may be ineffective because conceptus is small
Term
milepristone (RU486)
3-4 LMP
Definition
anti-progesterone pill impairs growth of endometrium
can be used a a post-coital pill
95% effective in preventing implantation
Term
insertion of IUD
3-4 LMP
Definition
mechanical expulsion of endometrium
insertion stimulates breakdown of endometrium
95% effective in preventing implantation
Term
legal abortion
Definition
following confirmation of pregnancy (HCG test)
50% of abortions occur prior to week 8 LMP
90% prior to week 12 LMP
embryo size- week 3-8 PF = .5-1 inch
week 6-12 PF = 1-4 inches
Term
medical abortion
mifepristone (RU486) plus misoprostol
Definition
chemical expulsion
mifepristone blocks progesterone, induces endometrial shedding
method allows for earliest abortion
oral pills
follow up care
Term
misoprostol
Definition
prostaglandin induces uterine contractions, expulsion of conceptus
Term
medical abortion
methotrexate plus misoprostol
Definition
chemical expulstion
methotrexate interferes with cell growth of zygote
96% effective, doctor visits
prescription pill
Term
surgical abortion
vacuum aspiration
Definition
86% of total abortions
mechanical extraction
1st trimester
5 minute procedure, slight dilation of cervix, vacuum aspiration of uterine contents
local anesthetic
minimal risk of uterine damage
Term
surgical abortion
dilation and curettage
Definition
mechanical extraction
1st trimester
general anesthesia, may require hospitalization
dilation of cervix, scraping of uterine wall with curette (metal loop);
removal of endometrium and embryo
5-10 minute procedure
used primarily as medical treatment after miscarriage
Term
general issues of second trimester abortion
Definition
10% of abortions occur between weeks 13-24 PF
8% due to results of amniocentesis, chorionic villi scans, ultrasound, or blood analyses indicating fetal defects
1% maternal life/health is in jeopardy
1% pregnancy not discovered earlier
viability legally set at 24-26 week LMP
fetal size= 4-14 inches, 2/3 oz - 2 lbs
Term
surgical abortion
dilation and evacuation (D&E)
Definition
mechanical extraction
weeks 12-16 LPM
sizable dilation of cervix is required
large suction cannulae is used with surgical instruments, fetal tissue must be surgically section to be removed
process may take an hour to complete
Term
medical abortion
mifepristone plus gemeprost
Definition
chemical expulsion
multiple doses, vaginal suppositories over 24 hours
weeks 12-19 weeks LMP
hospital clinic
Term
surgical abortion
late-term intact D & X
Definition
mechanical extraction
late 2nd trimester (16-24 weeks LMP)
2000 per year
safest method in late 2nd trimester
3 days of dilation of cervix
clamp umbilical cord, inject fetal heart with digoxin
extract fetus with forceps, collapse skull by puncture and aspiration
Term
chemical abortion
labor induction instillation
Definition
chemical expulsion
2nd trimester
injection of prostaglandins or hypertonic saline solution causes uterine contractions (induced labor), injected in amniotic sac
dilation of cervix induces labor within 12-36 hours
nausea, diarrhea, torn cervix, hemorrhage are risks
12-48 hour hospital stay required
fetus is usually born dead
Term
surgical abortion
hysterotomy
Definition
emergency procedure
major abdominal surgery
2nd trimester (20-24 weeks LMP)
essentially a Cesarean section
requires general anesthetic
used when other techniques are contraindicated as a threat to maternal life
extremely rare
focus to save mom
Term
general issues third trimester abortion
Definition
.1% of abortions happen
pregnancy is threat to life
heroic effort to save fetus
fetal size 14-20 inches, 2-8 lbs
Term
methods used third trimester
Definition
intact D & X- safest method
emergency C-section
labor induction
Term
mortality rate for legal abortion
Definition
3-4 deaths per year
Term
infertility
Definition
abortion poses little threat to infertility
Term
adoption
Definition
1945-1975 closed adoption
1975-present open adoption
56,000 relinquished each year
1970-present decline in relinquishment of white middle class infants from 17% to 3%, no change for the negros...7%
Term
relinquishment syndrom
Definition
50% of mothers regret doing it
sense of loss
Term
teen motherhood
Definition
1 million become pregnant annually, 33% of teen population
34% abort, 53% rear, 6% relinquish, 5% miscarry
living in poverty
93% don't marry child's father
for some teens its good
most children born/reared by teen mothers have deficits
continue cycle of povery and sex
Term
teen fathers
Definition
85% attempt to provide financial assistance, but most fail to follow through
initial good intentions, most disengage
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