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Old 09-09-2011
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Default Fetus in utero.

I have a question, which can probably sound dumb, but I do not want this one to pop up in my head on the X-day...

So when fetus is in utero, from week 3 to week 8(9) there is a major organ development (alcohol would be extremely dangerous at this point of the time). The gut tube is in the yolk sac and makes its way back to the abdomen by the end of this period (if it fails to return - omphalocele). There is an amniotic fluid around fetus, which (I suppose) the fetus "consumes" as an energy source? (there is lots of conditisons causing polyhidramniosis - tracheoesophageal fistula, pyloric stenosis, dodenal atresia, anular pancreas..)

So my question is what is the way of amniotic fluid? Where does it go to? Does the fetal intestine absorb this fluid?

Thank you.
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Old 09-09-2011
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you are right and ur on target with the diseases that are associated with polyhydromnios
after absorption, the fetus consumes electrolytes and all the necessary ingredients and pass it back to amniotic cavity thru kidneys, recall when there is dec excretion thru kidneys, there is less amniotic fluid for example in diseases like renal failure/ autosomal recessive polycystic kidney disease!
hope this helps!
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Old 09-09-2011
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I see.
So kidney filtrate the amniotic fluid, but before that i believe fluid must be absorbed in the intestine? and how is it returned back to the chorionic cavity? Through urethra? And if it is filtered through the intestine, this means (to me) that it is through the simple columnar epithelium of the intestine, which should probably renew every 2 weeks (not sure), so there must be a formation of stool also?
But I know that baby passes the meconium after the delivery, so is this the stool that forms through all the fetal life of the baby?

Just trying to build a big picture...
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Old 09-09-2011
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Quote:
Originally Posted by DocSikorski View Post
I see.
So kidney filtrate the amniotic fluid, but before that i believe fluid must be absorbed in the intestine? and how is it returned back to the chorionic cavity? Through urethra? And if it is filtered through the intestine, this means (to me) that it is through the simple columnar epithelium of the intestine, which should probably renew every 2 weeks (not sure), so there must be a formation of stool also?
But I know that baby passes the meconium after the delivery, so is this the stool that forms through all the fetal life of the baby?

Just trying to build a big picture...
you are right, meconium is passed only after preg, which is the 1st stool.
so yeh amniotic fluid is absorbed by the intestine and this is how it gains entry to the blood of the fetus and then filtered thru the kidneys!... malformed kidneys----> dec amniotic fluid!
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Old 10-17-2011
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So basicaly thats what it is:
Blood through umbilical artery to baby, baby pees, that creates amniotic fluid, than drinks this fluid (or does not drink if swallowing center is missing, generally if the brain is missing)
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