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Distributions of gestational age at birth, overall preterm birth, and spontaneous preterm birth.
| Gestational Age (wks) | Min | 10th | 25th | 50th | 75th | 90th | Max | |
|---|---|---|---|---|---|---|---|---|
| Male Fetuses | 23.3 | 36.6 | 38.3 | 39.1 | 40.0 | 40.7 | 42.7 | |
| Female Fetuses | 21.1 | 37.0 | 38.1 | 39.1 | 40.1 | 40.7 | 42.7 | |
| Male Fetuses | Female Fetuses | |||||||
| Preterm Birth | N (%) | N (%) | ||||||
| Yes | 53 (10.7%) | 41 (8.9%) | ||||||
| No | 444 (89.3%) | 419 (91.1%) | ||||||
| Spontaneous Preterm Birth | N (%) | N (%) | ||||||
| Yes | 32 (6.6%) | 22 (4.9%) | ||||||
| No | 451 (93.4%) | 428 (95.1%) | ||||||
