ANHB2216 Lecture 17: Lectures 17-20

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Lecture'17:'Pregnancy'IV:'Monitoring'Fetal'Wellbeing:'
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Abnormal'Development:'
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Birth'Weight'and'Perinatal'and'Infant'Mortality'Rate:'
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Incidence'of'Birth'Defects'in'WA:'
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Critical'Periods'in'Human'Development:'
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Monitoring'Fetal'Wellbeing:'
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Document Summary

What is the probability the fetus actually has the condition, given the test was positive? o prevalence of condition in population o sensitivity of test probability that the test will be positive when the individual really has the condition o specificity probability that the test will be negative given that the individual does not have the condition. Blood volume increases overall by 40% o plasma more than red blood cells (initially) o kidneys retain more fluid (estrogen effect) o peripheral oedema swelling o haematocrit (%rbc in the blood) falls. Little change in respiratory rate o volume of air breathed in per breath o fetus produces co2 mothers system o due to increased co2 sensitivity in hypothalamus (progesterone effect) Lactation established lactation o maximal milk yield (~850 ml/day) o maintained by milk removal infant demand o prolactin (milk production) o oxytocin (milk ejection)

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