| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 15 hours | (7) |
| 15 - 21 hours | (40) |
| 21 - 30 hours | (870) |
| 30 - 43 hours | (2220) |
| 43 - 61 hours | (853) |
| 61 - 86 hours | (222) |
| 86 - 122 hours | (56) |
| 122 - 172 hours | (23) |
| 172 - 243 hours | (5) |
| 243 - 342 hours | (3) |
| 342 - 483 hours | (3) |
| 483 - 681 hours | (5) |