| Doubling Time | Number of Pregnancies in this range |
|---|---|
| 11 - 16 hours | (3) |
| 16 - 25 hours | (52) |
| 25 - 36 hours | (694) |
| 36 - 54 hours | (759) |
| 54 - 80 hours | (120) |
| 80 - 118 hours | (14) |
| 118 - 174 hours | (3) |
| 174 - 258 hours | (0) |
| 258 - 380 hours | (0) |
| 380 - 561 hours | (0) |
| 561 - 828 hours | (0) |
| 828 - 1222 hours | (1) |