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 61
12 85 3 2583 191
13 147 5 4622 363
14 235 8 8270 650
15 372 11 14798 1426
16 558 18 3138 1797
17 820 12 5367 1821
18 1185 30 9289 1874
19 1677 40 12979 1779
20 2423 52 13975 1564
21 3510 70 20956 1337
22 4939 152 27554 1059
23 6880 107 36231 889
24 9134 138 47639 694
25 11747 177 62640 571
26 14830 227 82364 471
27 18383 291 108300 386
28 23929 374 203398 341
29 30332 480 394836 288
30 33222 995 189191 238

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