Table 1.
Characteristics of the study population.
| Characteristic | First | Prior | Spont. | Prior |
|---|---|---|---|---|
| conception | termination | abortion | delivery | |
| Number women evaluated | 52 | 10 | 16 | 77 |
| Mean age (SD in years | 32.3 (3.8) | 33.3 (4.7) | 36.0 (5.5) | 34.6 (3.7) |
| Mean body mass index (SD) | 22.5 (2.6) | 22.9 (2.2) | 23.0 (3.1) | 22.4 (3.1) |
| In vitro fertilization | 6 (11.3%) | 3 (30.0%) | 5 (29.4%) | 2 (2.6%) |
| Preterm delivery | 2 (3.8%) | 0 | 0 | 1 (1.3%) |
| Mean gestational age at birth (SD) | 39.2 (1.5) | 39.7 (0.6) | 39.3 (1.1) | 39.5 (1.0) |
| Mean neonatal birthweight (SD) g | 3294 (513) | 3306 (404) | 3355 (534) | 3287 (500) |
| Race | ||||
| White | 52.9% | 37.5% | 46.7% | 63.5% |
| Asian | 13.7% | 25.0% | 13.3% | 10.8% |
| Hispanic | 5.9% | 0 | 6.7% | 2.7% |
| Black | 2.0% | 0 | 0 | 0 |
| Mixed | 25.5% | 37.5% | 33.3% | 23.0% |
Spont, spontaneous; SD; standard deviation.