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<p>'extracorporeally,' its constituents are hidden and normally not recognised by the foetal immune system.</p>

<p>For the meconium within the amniotic fluid to successfully cause MAS, it has to enter the <a href="page.php?w=respiratory_system">respiratory system</a> during the period when the fluid-filled lungs transition into an air-filled organ capable of <a href="page.php?w=gas_exchange">gas exchange</a>.</p>

<p><big>Causes</big></p>
<p>The main theories of meconium passage into amniotic fluid are caused by fetal maturity or from foetal stress as a</p><p>
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