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 56
12 85 3 2583 179
13 146 5 4622 346
14 233 8 8270 620
15 368 11 14798 1372
16 556 18 3138 1722
17 813 12 5367 1747
18 1173 30 9289 1802
19 1662 40 12979 1708
20 2395 52 13975 1504
21 3454 70 20956 1290
22 4880 152 27554 1018
23 6682 107 36231 853
24 8891 138 47639 663
25 11452 177 62640 544
26 14488 227 82364 445
27 18097 291 108300 366
28 23519 374 203398 323
29 28991 480 394836 272
30 32241 995 189191 224

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