13 April 2022: Clinical Research
External Quality Assessment of Maternal Serum Levels of Alpha-Fetoprotein, Free Beta-Human Chorionic Gonadotropin, and Unconjugated Estriol in Detecting Down Syndrome and Neural Tube Defects in the Second Trimester of 87 Maternal Serum Samples, Based on 105-139 Days
Yiming Chen 12AEG** , Yijie Chen 2BE* , Yezhen Shi 3CD , Wenwen Ning 2BE , Xiaoying Wang 1B , Liyao Li 1BC , Huimin Zhang 2FDOI: 10.12659/MSM.935573
Med Sci Monit 2022; 28:e935573
Figure 2 The level of α-fetoprotein (AFP), free beta human chorionic gonadotropin (free β-hCG), and unconjugated estriol (μE3) multiple of the median (MoM) values in different screening laboratories. (A) AFP MoM; (B) free β-hCG MoM; (C) uE3 MoM. a – Laboratory A; b – Laboratory B; c – Laboratory C; d – Laboratory D; e – Laboratory E; f – Laboratory F.