Table 1.
Sample series characteristics
| 125 Blood Samples Collected from 122 Pregnant Women (Including Three Redraws) | |||
|---|---|---|---|
| Plurality | Singleton | 118 pregnancies | 96.7% |
| Twin | 4 pregnancies | 3.3% | |
| Fetal sex | Female | 53 pregnancies | 43.4% |
| Male | 65 pregnancies | 53.3% | |
| Twin – F + F | 1 pregnancy | 0.8% | |
| Twin – F + M | 2 pregnancies | 1.6% | |
| Twin – M + M | 1 pregnancy | 0.8% | |
| Maternal age | Range | 19‐41 y/o | |
| Median | 32 y/o | ||
| Maternal BMI | Range | 18.90‐45.89 kg/m2 | |
| Median | 25.34 kg/m2 | ||
| GA at sampling | Range | 10 weeks and 2 days to 35 weeks and 1 day | |
| Median | 12 weeks and 6 days | ||
| Recruitment | Houston | 87 samples | 69.6% |
| New York | 38 samples | 30.4% | |
| Paternal samples | Not available for | 71 pregnancies | 58.2% |
| Available for | 51 pregnancies | 41.8% | |
| Blood: 44 samples (84.8%) | |||
| Saliva: 7 samples (15.2%) | |||
| Diagnostic testing | No testing | 44 women | 36.1% |
| CVS | 42 women (4 samples PP) | 34.4% | |
| Amniocentesis | 33 women (3 samples PP) | 27.0% | |
| Both | 3 women | 2.5% | |
Abbreviations: F, female; M, male; GA, gestation age; PP, postprocedure (= blood sample collected few minutes to 2 hours after diagnostic procedure). Of note, BMI data were only available for 103 out of 125 samples (=82.4%).