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 84 3 2583 180
13 146 5 4622 348
14 234 8 8270 627
15 370 11 14798 1384
16 557 18 3138 1734
17 813 12 5367 1758
18 1180 30 9289 1814
19 1665 40 12979 1720
20 2407 52 13975 1516
21 3466 70 20956 1300
22 4903 152 27554 1026
23 6721 107 36231 861
24 8988 138 47639 671
25 11555 177 62640 551
26 14730 227 82364 451
27 18254 291 108300 371
28 23758 374 203398 329
29 30250 480 394836 276
30 32391 995 189191 227

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