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 15
11 60 13 1443 65
12 86 3 2583 200
13 147 5 4622 380
14 241 8 8270 692
15 376 11 14798 1496
16 563 18 3879 1884
17 833 12 6600 1910
18 1200 30 9289 1975
19 1698 40 12979 1870
20 2458 52 16384 1636
21 3563 70 23310 1402
22 4985 152 27554 1109
23 7064 107 36231 932
24 9189 138 47639 726
25 11792 177 62640 598
26 15039 227 82364 493
27 18910 291 108300 407
28 24297 374 203398 359
29 31106 480 394836 304
30 34497 995 189191 252

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