Repro 9.1 fetal physiology. Flashcards Preview

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Flashcards in Repro 9.1 fetal physiology. Deck (37)
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What is the function of vernix caseosa?

Waterproofs the fetus' skin to help protect it.


How is amniotic fluid produced and recycled?

produced through the kidneys and urination,

recylced via lung movements, swallowing, and the placental and fetal membranes.


What is meconium?

'baby poo'

The debris of the amniotic fluid as it passes through the GI tract. Shouldnt be released until after birth.


What are some complications of meconium being passed before birth?

-due to practice breathing it can lead to respiratory distress

-the presence of the meconium into the amniotic fluid can cause distress of the child.

-the amniotic fluid will become tinged yellow/green.


What is amniocentesis?

Sampling of the amniotic fluid using a probe that is ultrasound guided.

allows collection of fetal cells which can be used for genetic testing.

Safer than chorionic villus sampling which carries a higher mortality rate.


How is billirubin metabolism conducted in the fetus and why?

via the placenta,

The fetus has no way of excreting billirubin, so it doesnt conjugate it which allows it to be transfered to the placenta and to the mothers circulation.


Why is physiological jaundice common in the fetus?

The fetus has to quickly change to conjugating it's own billirubin after birth, something which it hasn't had to do before.

it commonly just resolves itself.

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