| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 15 hours | (6) |
| 15 - 22 hours | (62) |
| 22 - 32 hours | (1578) |
| 32 - 46 hours | (3892) |
| 46 - 66 hours | (1155) |
| 66 - 96 hours | (201) |
| 96 - 137 hours | (52) |
| 137 - 197 hours | (22) |
| 197 - 283 hours | (2) |
| 283 - 406 hours | (2) |
| 406 - 583 hours | (2) |
| 583 - 837 hours | (1) |