Descriptive statistics of the study population
| Statistics | |
|---|---|
| Maternal age at birth (median) (IQR) (yr) | 34 (29.8–36.0) |
| Fetal sex | |
| Male (No.) (%) | 34 (48.6%) |
| Female (No.) (%) | 36 (51.4%) |
| Abnormal triple test findings (No.) (%) | 3 (4.3%) |
| Abnormal nuchal translucency findings (No.) (%) | 3 (4.3%) |
| Karyotype (No.) (%) | |
| Not performed | 31 (44.3%) |
| Normal findings | 39 (55.7%) |
| Abnormal findings | 0 (0%) |
| Chromosomal microarray (No.) (%) | |
| Not performed | 48 (68.6%) |
| Normal findings | 21 (30%) |
| Abnormal findings | 1 (1.4%) |
| Length of pregnancy (mean) (SD) (wk) | 38.8 (1.3) |