Abstract
Summary
Fluid production by fetal lung of guinea pigs and goats has been demonstrated through cannulation of the fetal trachea in the last part of the pregnancy. This fluid is probably produced by an ultrafiltration process because its physico-chemical features in the last third of pregnancy are very similar to those of the interstitial fluid. It is suggested that the fetal lung is an important source of amniotic fluid during this period of fetal life.
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