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 12
11 61 13 1443 49
12 85 3 2583 169
13 147 5 4622 329
14 231 8 8270 584
15 366 11 14798 1303
16 550 18 3138 1628
17 803 12 5367 1652
18 1161 30 9289 1707
19 1646 40 12979 1616
20 2375 52 13975 1421
21 3431 70 20956 1212
22 4740 152 27554 952
23 6603 107 36231 800
24 8744 138 47639 621
25 11434 177 62640 509
26 14410 227 82364 418
27 17983 291 108300 344
28 23355 374 203398 303
29 28676 480 394836 253
30 32012 995 189191 207

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