[Densitometry and fetal superficial cell count in the amniotic fluid for the determination of fetal lung maturity]

It was shown that a spectrophotometric investigation of the amniotic fluid for the determination of fetal lung maturity can be achieved with a photometer of the wave length 644 nm (CD) and 623 nm (HG) in conjunction with a count of superficial cells. In a small number of investigations the combination of spectrophotometry and fetal cell count is a sufficiently accurate method to determine fetal lung maturity.