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| fertilized egg - single cell |
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| first 14 days of human development - starting at conception |
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| day 15 - the end of week 8 |
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| name of the endometrium during pregnancy |
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| What does placenta mean in latin? |
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| in the placenta and cord describe oxygenation |
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1 vein carrying oxygenated blood
2 arteries carrying unoxygenated blood |
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| umbilical vein's blood flows through here into inferior vena cava bypassing the liver |
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| links left and right atrium |
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| fetal contribution from placenta derives from... |
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| cell drinking: absorb extracellular fluid and contents |
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| a specialized connective tissue surrounding the blood vessels in the umbilical cord |
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stimulates changes in mothers metabolic processes ensuring more:
protein
glucose
minerals
... for fetus |
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| human chorionic gonadotropin |
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| prevents normal involution of the corpus luteum at end of menstral cycle |
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| What happens if corpus luteum stops functioning before 11th week |
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| What hormone is tested for in pregnancy tests |
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| As soon as implantation has occurred |
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1. increases secretions of fallopian tubes and uterus t provide appropriate nutritive matter for developing morula and blastocyst
2. aid in ovum transport through tubes
3. causes decidual cells to develop in uterine endometrium
4. must be present in high levels for implantation to occur
5. decreases uterine contractions reducing risk for spontaneous abortion |
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human chorionic thyrotropin
placental hormone |
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| Amniotic Fluid is composed of what (when) |
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early: ultrafiltrate of maternal plasma
2nd trimester: extracellular fluid diffused through fetal skin
after 20 weeks: fetal urine, pulmonary fluid, fluid filtered through placenta |
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| what does the amniotic fluid do |
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cushion
temp control
minimal nutritive function
promote normal growth and development of fetal lungs and GI tract |
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| What is normal amniotic fluid at 12 weeks? |
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| What is normal amniotic fluid at mid-point? |
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| What is normal amniotic fluid at term? |
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| What is the fetal anomaly rate of a 2 vessel cord? |
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| When are all organ structures present (but not fully developed)? |
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