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15 Cards in this Set

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amniotic fluid is constantly being formed and reabsorbed, so it is never stagnant. It is formed at the rate of
500 ml/24 hours
At term the average amt. of amniotic fluid present is ____
700-1000 ml
describe the reasons why amniotic fluid may be excessive.
esopogeal atresia
when fetus doesn't swallow
anencephalus
polyhydramnios
over 2000 ml
describe the reasons why the amt. of amniotic fluid may be below normal (olighydramnios)
when kidney funtion is disturbed.
List the purposes of the amniotic fluid:
allows freedom of movement
protects fetus from temp. changes
shields against abdominal blows
permits symmetrical external growth.
List the elements that make up the amniotic fluid.
albumin, urea, uric acid, creatinine, lecithin, sphingomyelin, bilirubin, fat, fructose, leukocytes, proteins, epithelial cells, enzymes. It is slightly alkaline and has fine hair called lanugo.
a study of fetal cells from the amniotic fluid can yield what kind of info?
the sex of infant
normality of chromosome number and structure
the L/S ratio which determines the maturity of the fetus.
If membranes rupture before birth and the bulk of the amniotic fluid is lost, some will always surround the fetus because ...
of the constant formation of fluid.
Amniotic fluid is slightly alkaline with a pH of
7.2
Urine is
acidic with a pH of 5.0-5.5
The fertilized ovum is a ...
zygote until implantation.
From implantation to the end of the 9th week, it is an
embryo.
From the 9th week to end of pregnancy it is a
fetus.
What direction does the development of the fetus proceed in?
a cephalocaudal direction: the head develops 1st and lower body develops last.