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Table 1 Sample characteristics of the study population (n = 208)

From: A fetal fraction enrichment method reduces false negatives and increases test success rate of fetal chromosome aneuploidy detection in early pregnancy loss

Characteristics All Male fetus Female fetus
Sample size 208 102 106
Maternal age (year) 30 (27 to 32) 30 (27 to 32) 29 (23 to 32)
BMI (kg/m2) 21.4 (20.1 to 23.2) 21.3 (20.1 to 23.2) 22.0 (20.5 to 24.4)
Gestational age (week) 8 (7 to 10) 8 (7 to 9.3) 10 (8.5 to 11.5)
Uniquely mapped reads (Mb)* 2.8 (2.3 to 3.5) 2.8 (2.3 to 3.5) 2.4 (1.9 to 3.7)
Average size of cfDNA (bp) 129 (124 to 135) 129 (124 to 136) 127 (123 to 132)
Fetal fraction with enrichment (%) NA 15.7 (10.4 to 25) NA
Fetal fraction without enrichment (%) NA 6.1 (4.1 to 8.6) NA
Foldchange of fetal fraction NA 2.8 (2.1 to 3.4) NA
  1. *The uniquely mapped reads are the result of size selection NIPS