Comparison of 3-kit methods for determination of human chorionic somatomammotropin by radioimmunoassay.

1. Three commercially available kit procedures for human chorionic somatomammotropin (HCS) were investigated. 2. The comparison of the methods included procedure, accuracy, precision, sample requirement and time required for analyses. 3. While one kit gave significantly higher values and requires more time to obtain results, each of 3 procedures was concluded to provide clinically useful information.