Beta Doubling times for Successful* Twins 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 17.17 9.57 43.62 5
4 - 8 17.33 9.57 43.62 15
8 - 16 21.60 9.57 43.62 39
16 - 32 25.40 9.57 115.65 102
32 - 64 29.90 9.57 115.65 278
64 - 128 34.82 9.57 157.89 694
128 - 256 37.75 11.50 1222.54 1589
256 - 512 39.06 11.50 157.67 2635
512 - 1024 39.71 11.50 178.45 3157
1024 - 2048 40.78 11.50 245.91 2793
2048 - 4096 42.46 11.50 124.22 2169
4096 - 8192 44.57 11.50 329.62 1511
8192 - 16384 49.53 15.66 558.15 1045
16384 - 32768 61.74 15.66 558.15 659
32768 - 65536 78.79 22.81 364.97 338
65536 - 131072 97.60 22.81 599.84 169
131072 - 262144 151.72 25.08 8045.43 35
262144 - 524288 118.26 25.08 123.60 3

* Pregnancies are deemed successful if a heartbeat is detected.
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Show results for pregnancies between and years old