| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 14 hours | (3) |
| 14 - 17 hours | (8) |
| 17 - 22 hours | (42) |
| 22 - 28 hours | (80) |
| 28 - 36 hours | (55) |
| 36 - 46 hours | (29) |
| 46 - 59 hours | (19) |
| 59 - 75 hours | (2) |
| 75 - 96 hours | (2) |
| 96 - 122 hours | (1) |
| 122 - 156 hours | (1) |
| 156 - 199 hours | (1) |