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TBL 1
Fetal Period and Placenta
23
Medical
Graduate
11/11/2011

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Term
Assess the clinical relevance of the skull having the largest circumference of all parts of the body at the end of the ninth month.
Definition
Important for its passage through the birth canal.
Term
Month when movement of the fetus can be felt.
Definition
Month 5
Term
Month face becomes human looking.
Definition
Month 3
Term
Month limbs reach their relative length
Definition
Month 3
Term
Month muscular activity begins
Definition
Month 3
Term
Month sex of the fetus can be determined by ultrasound
Definition
Month 3
Term
When does the fetus achieve 90% survival rate.
Definition
6.5-7 months due to dev't of respiratory system, CNS, and subcutaneous fat deposition.
Term
Describe the transformation of the uterine spiral arteries that results in increased maternal blood flow into the lacunar or intervillous spaces.
Definition
Epithelial-to endothelial transition.
Vessels from small diameter, high resistance vessels to large diameter, low resistance vessels.
Term
Define syncytial knots.
Definition
Frequently the syncytium becomes very thin, and large pieces containing several nuclei may break off and drop into the intervillous blood lakes. Signify placental hyperplasia and maturity.
Term
Summary of trophoblastic disorder that causes preeclampsia.
Definition
Related to failed or incomplete differentiation of cytotrophoblast cells, from epithelial to endothelial. Invasion of maternal blood vessels is rudimentary.
Term
Causes for trophoblastic disorder that causes preeclampsia.
Definition
Placental mosaicism (genetic defects in trophoblasts) Maternal diseases (vascular problems like diabetes)
Term
Clinical outcomes of trophoblastic disorder that causes preeclampsia.
Definition
Fetal growth retardation, fetal death, death of the mother.
Term
Origin of the decidual plate.
Definition
Decidua basalis = mother.
Term
Origin of the chorionic plate.
Definition
Chorion frondosum = fetus.
Term
[image]
Definition
Maternal side of the placenta.
Term
[image]
Definition
Fetal side of placenta
Term
Placental Barrier
Definition
Endothelial lining of fetal vessels --> a layer of cytotrophoblast --> a layer of synctiotrophoblast
Term
The consequence of a short-term interruption in oxygen delivery to the fetus.
Definition
Fatal to the fetus.
Term
Compare rates of passage across the placental barrier by viruses, drugs, and most maternal hormones.
Definition
Viruses, and drugs cross without difficulty. Most maternal hormones do not cross.
Term
Passive Immunity of the fetus.
Definition
Maternal IgG is transported from mother to fetus.
Term
Source of placental hormone production
Definition
Synctiotrophoblast,
Term
Placenta-derived estrogen actions
Definition
Stimulate uterine growth and dev't of mammary glands.
Term
Somatomammotropin action
Definition
Gives fetus priority on glucose from maternal blood and promotes breast dev't for milk production.
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