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 178
13 147 5 4622 343
14 233 8 8270 613
15 368 11 14798 1358
16 552 18 3138 1702
17 807 12 5367 1724
18 1171 30 9289 1780
19 1659 40 12979 1685
20 2381 52 13975 1483
21 3433 70 20956 1270
22 4820 152 27554 1000
23 6630 107 36231 837
24 8781 138 47639 652
25 11452 177 62640 536
26 14476 227 82364 442
27 18097 291 108300 364
28 23519 374 203398 321
29 28991 480 394836 270
30 32127 995 189191 223

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