| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 22 - 30 hours | (2) |
| 30 - 40 hours | (1) |
| 40 - 54 hours | (5) |
| 54 - 72 hours | (29) |
| 72 - 96 hours | (50) |
| 96 - 129 hours | (34) |
| 129 - 173 hours | (27) |
| 173 - 231 hours | (13) |
| 231 - 308 hours | (9) |
| 308 - 412 hours | (3) |
| 412 - 550 hours | (2) |
| 550 - 735 hours | (2) |