1 - Scheme Overview

Assessment of accuracy – quantitative methods.

Participating labs can choose to be assessed for all the analytes of this scheme, or simply a subset of analytes of interest.

2 - Assessment Frequency

Number of surveys per year: 4
Number of control samples per survey: 2
Number of samples per year: 8

3 - List of Analytes Assessed 

• AFP
• Risk calculation
• Estriol
• hCG total
• hCG, Free β chain
• PAPP-A

4 - Description of the Control Samples

Lyophilized human control serums (samples to be resuspended in 1 mL of distilled water).

5 - Demographic Data

Demographic data are provided with each sample to allow risk calculation.