| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 21 - 31 hours | (2) |
| 31 - 44 hours | (4) |
| 44 - 64 hours | (15) |
| 64 - 91 hours | (53) |
| 91 - 131 hours | (110) |
| 131 - 189 hours | (102) |
| 189 - 272 hours | (54) |
| 272 - 390 hours | (33) |
| 390 - 560 hours | (20) |
| 560 - 804 hours | (6) |
| 804 - 1155 hours | (4) |
| 1155 - 1658 hours | (1) |