Amniotic fluid lamellar body counts for the determination of fetal lung maturity: an update.

Aim: To reassess the cut-off value for lamellar body counts (LBs) for fetal lung maturity (FLM) over a 10-year study period.

Patients And Methods: 178 pregnancies were selected under strict inclusion criteria and delivered within 48 h from amniocentesis. FLM was determined by amniotic fluid LBs in centrifuged samples (300 x g for 10 min) in a commercially available Coulter Counter.