Fetuin A Concentration in the Second Trimester Amniotic Fluid of Fetuses with Trisomy 21 Appears to Be Lower: Phenotypic Considerations

Table 1

Descriptive characteristics of women (mean (standard deviation)) and levels (median (25th–75th percentile)) of fetuin A according to fetal status (trisomy 21 or euploid).

	Trisomy 21 fetuses, 𝑛=25	Controls, 𝑛=25
Maternal age (years)	35.9 (5.2)	34.9 (5.1)
Gestation (weeks)	19.3 (3.1)	18.4 (1.6)
Fetuin A (ng/mL)	5.3 (4.3–6.4)	6.8 (5.1–8.7)