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Patient characteristics of 9985 pregnancies undergoing the NIPT test
| Clinical characteristics | Mean value (range) |
|---|---|
| Maternal age | 32.5 (20–50) |
| Body mass index, kg/m2 | 24.3 (14.5–43.5) |
| Gestational age, wk | 16.3 (10–26) |
| Indications for NIPT | Ratios % |
|---|---|
| Maternal serum screening result | 26.3 |
| Advanced maternal age ≥ 35 | 41.2 |
| Others (family history, IVF pregnancy, decision of perinatology council, etc.) | 32.5 |
wk week, IVF in vitro fertilization, NIPT non invasive prenatal test
