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Characteristics of the study population (n = 17).
| Characteristic | Mean ± SD |
|---|---|
| Maternal age at delivery (years) | 34.6 ± 4.7 |
| Height (m) | 1.68 ± 0.07 |
| Weight (kg) | 65.6 ± 10 |
| Amniocentesis (weeks of gestation) | 18.5 ± 1.8 |
| Delivery (weeks of gestation) | 39.3 ± 1.8 |
All 17 infants were karyotypically normal on amniocentesis and healthy at birth with normal birth weights.
