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 15
11 60 13 1443 63
12 85 3 2583 195
13 147 5 4622 373
14 240 8 8270 677
15 376 11 14798 1469
16 561 18 3879 1845
17 827 12 6600 1869
18 1191 30 9289 1926
19 1683 40 12979 1827
20 2445 52 13975 1602
21 3556 70 20956 1372
22 4980 152 27554 1089
23 7034 107 36231 914
24 9174 138 47639 713
25 11761 177 62640 586
26 14964 227 82364 482
27 18600 291 108300 396
28 23968 374 203398 350
29 30488 480 394836 295
30 33397 995 189191 244

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