A rapid and inexpensive laser nephelometric assay for plasma pregnancy specific beta1-glycoprotein levels

A laser neophelometric method for the measurement of maternal plasma pregnancy specific beta1-glycoprotein levels is described. Fifty plasma specimens can be analysed within four hours at a low reagent cost. The assay has been used to determine the range of plasma pregnancy specific beta1-glycoprotein concentrations in 212 normal pregnancies of from 31 to 41 weeks gestation.