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 75
12 86 3 2583 211
13 149 5 4622 405
14 243 8 8270 733
15 378 11 14798 1569
16 566 18 4913 1987
17 839 12 6600 2016
18 1209 30 9289 2078
19 1713 40 12979 1966
20 2467 52 16384 1725
21 3579 70 23310 1484
22 5005 152 32625 1187
23 7073 107 36231 995
24 9358 138 47639 775
25 12124 177 62640 638
26 15234 91 82364 522
27 19117 231 108300 433
28 24330 374 203398 379
29 31106 480 394836 322
30 35930 995 189191 268

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