Beta Scores for Successful* Twins Pregnancies

Days Past Ovulation
(What is this?)
Median HCG Level Lowest HCG Level Reported Highest HCG Level Reported Number of women reporting a number for this day
10 24 5 289 17
11 60 13 1443 69
12 86 3 2583 204
13 149 5 4622 393
14 242 8 8270 712
15 376 11 14798 1529
16 565 18 3879 1929
17 835 12 6600 1956
18 1204 30 9289 2020
19 1702 40 12979 1917
20 2463 52 16384 1680
21 3576 70 23310 1444
22 5000 152 32625 1150
23 7072 107 36231 965
24 9266 138 47639 756
25 12033 177 62640 622
26 15268 91 82364 513
27 19096 231 108300 424
28 24336 374 203398 372
29 31187 480 394836 315
30 35930 995 189191 262

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