| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 17 hours | (7) |
| 17 - 26 hours | (166) |
| 26 - 41 hours | (3016) |
| 41 - 64 hours | (3065) |
| 64 - 98 hours | (433) |
| 98 - 152 hours | (67) |
| 152 - 234 hours | (15) |
| 234 - 361 hours | (11) |
| 361 - 556 hours | (7) |
| 556 - 858 hours | (1) |
| 858 - 1322 hours | (0) |
| 1322 - 2038 hours | (1) |