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 619
15 368 11 14798 1370
16 555 18 3138 1717
17 809 12 5367 1739
18 1173 30 9289 1796
19 1660 40 12979 1700
20 2386 52 13975 1496
21 3446 70 20956 1282
22 4852 152 27554 1011
23 6673 107 36231 848
24 8867 138 47639 660
25 11434 177 62640 541
26 14476 227 82364 444
27 18093 291 108300 365
28 23437 374 203398 322
29 28867 480 394836 271
30 32127 995 189191 223

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