| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 21 - 31 hours | (2) |
| 31 - 45 hours | (4) |
| 45 - 65 hours | (17) |
| 65 - 95 hours | (61) |
| 95 - 137 hours | (119) |
| 137 - 199 hours | (104) |
| 199 - 288 hours | (59) |
| 288 - 418 hours | (31) |
| 418 - 605 hours | (16) |
| 605 - 876 hours | (6) |
| 876 - 1269 hours | (3) |
| 1269 - 1837 hours | (2) |