| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 13 hours | (3) |
| 13 - 16 hours | (4) |
| 16 - 20 hours | (17) |
| 20 - 24 hours | (52) |
| 24 - 30 hours | (66) |
| 30 - 37 hours | (42) |
| 37 - 45 hours | (23) |
| 45 - 55 hours | (14) |
| 55 - 67 hours | (6) |
| 67 - 83 hours | (1) |
| 83 - 101 hours | (1) |
| 101 - 124 hours | (1) |