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 23 5 289 14
11 60 13 1443 59
12 83 3 2583 188
13 146 5 4622 357
14 235 8 8270 644
15 371 11 14798 1415
16 557 18 3138 1776
17 815 12 5367 1802
18 1185 30 9289 1857
19 1676 40 12979 1762
20 2418 52 13975 1548
21 3500 70 20956 1324
22 4926 152 27554 1046
23 6801 107 36231 877
24 9068 138 47639 683
25 11644 177 62640 562
26 14775 227 82364 464
27 18370 291 108300 380
28 23929 374 203398 337
29 30332 480 394836 284
30 32756 995 189191 234

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