Optical density:OD:Pt:Amnio fld:Qn:Spectrophotometry
optical density:od:pt:amnio fld:qn:spectrophotometry
Optical density:Optical Density:To identify measures at a point in time:Amniotic fluid:Quantitative:Spectrophotometry
optical density:optical density:to identify measures at a point in time:amniotic fluid:quantitative:spectrophotometry