Beta Doubling times for Successful* Single Pregnancies

Beta range Median doubling time (hrs) Fastest doubling time (hrs) Slowest doubling time (hrs) Number of women reporting a doubling time for this day
2 - 4 21.62 12.00 42.74 11
4 - 8 24.53 12.00 124.58 54
8 - 16 28.02 12.00 124.58 177
16 - 32 33.57 14.45 365.73 574
32 - 64 35.78 14.53 731.84 1470
64 - 128 37.34 14.92 681.75 3060
128 - 256 38.33 14.96 505.12 4901
256 - 512 39.31 15.11 928.16 5845
512 - 1024 40.55 14.58 1873.27 5873
1024 - 2048 42.62 14.58 813.06 5113
2048 - 4096 45.91 14.58 723.05 4038
4096 - 8192 51.17 14.58 10704.95 2996
8192 - 16384 61.01 14.58 905.83 1952
16384 - 32768 75.38 22.49 4695.28 1160
32768 - 65536 103.19 22.49 1220.17 600
65536 - 131072 138.10 28.93 1658.40 269
131072 - 262144 195.48 28.93 15745.01 54
262144 - 524288 232.92 28.93 263.56 4

* Pregnancies are deemed successful if a heartbeat is detected.
Click here for a titillating rendition of how these doubling times were computed
Show results for pregnancies between and years old