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24 Cards in this Set
- Front
- Back
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what are the 2 major protein hormones produced by the placenta |
chorionic gonadotropin, placental lactogen |
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what are the 4 steroids produced by the placenta |
progesterone, estradiol, estriol, estrone |
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hormone production by the placenta increases in proportion to what |
placental mass |
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which hormone does not increase in proportion to placental mass |
CG, peaks at the end of the first trimester |
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what does CG do |
stimulates the ovary (corpus luteum) to produce progesterone which, prevents menstruation |
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why does the CG need to stimulate progesterone production |
placenta production is inadequate during this time |
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what does CG do to the LH receptors in the corpus luteum |
binds and activates |
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receptor activation increases what |
intracellular cyclic adenosine monophosphate |
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what does cAMP do |
stimulates the production of progesterone |
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CH binds weakly to what in the maternal thyroid |
TSH receptors |
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CG concentrations of how much are thyrotropic |
>1 million IU/L |
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how are serum specimens obtained |
phlebotomy technique |
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CG is stable in what |
maternal serum |
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CG is possible to ship and store at what temperature |
ambient temperature, store at 4C for 1 week |
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serum specimens showing what may give biased results |
hemolysis, lipemia, turbidity |
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CG testing is used to do what 3 things |
detect pregnancy and its abnormalities, screen for down syndrome and trisomy 18, monitor the course of a patient with a CG producing cancer |
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placental lactogen has what 2 properties |
potent growth, lactogenic |
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placental secretion near term is how much per day |
1-2 g |
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placental lactogen is the largest what |
hormone |
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what are the 6 biological activities associated with PL |
lactogenic, metabolic, somatotropic, luteotropic, erythropoietic, aldosterone -stimulating |
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PL has a significant role in preparing mammary glands for what |
lactation |
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is there a clinical reason to measure PL |
no |
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placenta produces what 2 hormones |
estrogen, progesterone |
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secretion of estrogens and progesterone throughout pregnancy ensures what 4 things |
appropriate development of the endometrium, uterine growth, adequate uterine blood supply, preparation of the uterus for labor |
