| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 16 hours | (3) |
| 16 - 23 hours | (28) |
| 23 - 34 hours | (678) |
| 34 - 50 hours | (2831) |
| 50 - 73 hours | (1480) |
| 73 - 107 hours | (336) |
| 107 - 155 hours | (78) |
| 155 - 226 hours | (27) |
| 226 - 328 hours | (16) |
| 328 - 478 hours | (6) |
| 478 - 694 hours | (1) |
| 694 - 1010 hours | (3) |