| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 17 hours | (2) |
| 17 - 26 hours | (12) |
| 26 - 39 hours | (256) |
| 39 - 60 hours | (1127) |
| 60 - 91 hours | (1073) |
| 91 - 139 hours | (350) |
| 139 - 211 hours | (71) |
| 211 - 320 hours | (25) |
| 320 - 487 hours | (10) |
| 487 - 740 hours | (2) |
| 740 - 1123 hours | (1) |
| 1123 - 1706 hours | (2) |