| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 21 - 30 hours | (4) |
| 30 - 42 hours | (12) |
| 42 - 59 hours | (69) |
| 59 - 83 hours | (237) |
| 83 - 116 hours | (307) |
| 116 - 162 hours | (203) |
| 162 - 227 hours | (100) |
| 227 - 318 hours | (34) |
| 318 - 445 hours | (18) |
| 445 - 623 hours | (7) |
| 623 - 871 hours | (4) |
| 871 - 1220 hours | (2) |