| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 14 hours | (5) |
| 14 - 19 hours | (15) |
| 19 - 26 hours | (161) |
| 26 - 35 hours | (278) |
| 35 - 47 hours | (192) |
| 47 - 63 hours | (97) |
| 63 - 84 hours | (34) |
| 84 - 113 hours | (17) |
| 113 - 152 hours | (7) |
| 152 - 204 hours | (5) |
| 204 - 273 hours | (5) |
| 273 - 365 hours | (1) |