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; Yijie Chen; Yezhen Shi; Wenwen Ning; Xiaoying Wang; Liyao Li; Huimin Zhang

doi:10.12659/MSM.935573

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^2F

DOI: 10.12659/MSM.935573

Med Sci Monit 2022; 28:e935573

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Figure 4 Linear correlation analysis of free beta human chorionic gonadotropin (free β-hCG) multiple of the median (MoM) value. a – Laboratory A; b – Laboratory B; c – Laboratory C; d – Laboratory D; e – Laboratory E; f – Laboratory F.

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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

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