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 85 13
11 60 13 1443 52
12 83 3 2583 173
13 146 5 4622 336
14 233 8 8270 603
15 367 11 14798 1338
16 550 18 3138 1675
17 805 12 5367 1701
18 1166 30 9289 1756
19 1656 40 12979 1663
20 2383 52 13975 1463
21 3449 70 20956 1251
22 4790 152 27554 983
23 6604 107 36231 823
24 8764 138 47639 641
25 11415 177 62640 524
26 14410 227 82364 432
27 18000 291 108300 356
28 23356 374 203398 314
29 28676 480 394836 263
30 32011 995 189191 216

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