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 14
11 60 13 1443 58
12 84 3 2583 185
13 146 5 4622 354
14 235 8 8270 637
15 371 11 14798 1406
16 557 18 3138 1768
17 815 12 5367 1795
18 1183 30 9289 1849
19 1671 40 12979 1754
20 2418 52 13975 1542
21 3490 70 20956 1317
22 4918 152 27554 1041
23 6790 107 36231 874
24 9028 138 47639 680
25 11644 177 62640 560
26 14775 227 82364 462
27 18370 291 108300 378
28 23929 374 203398 335
29 30332 480 394836 282
30 32756 995 189191 232

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