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Pregnancy Physiology (Implantation (Trophoblastic lacunae (Fill w/ blood…
Pregnancy Physiology
Implantation
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Receptive Phase: Galectin, selectin, heperan. OE2+EGF.
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Decidualisation of uterus: Prolactin, Prepares placenta.
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Placenta
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PO2 higher in foetus. Foetal Hb higher affinity, higher [O2]. RBCs nucleated
Nutrition, Excretion, immunity (IgG), Endocrine (HCG)
Timeline
Trimester 1 (wk 1-12)
Trimester 2 (wk 13-26)
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Growth, fat, blood, lungs
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Fertilisation, implantation
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Embryology
Pluriblast
Epiblast
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Amnion = extra-embryonic, yolk sac= ectoderm and mesoderm
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Trilaminar Disc
Mesoderm
Muscle, RBCs, tubules, Circ system
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Endoderm
Lung cells, thyroid, pancreas
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