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 62
12 85 3 2583 192
13 147 5 4622 365
14 237 8 8270 657
15 373 11 14798 1435
16 558 18 3138 1805
17 821 12 5367 1830
18 1191 30 9289 1883
19 1679 40 12979 1786
20 2434 52 13975 1570
21 3526 70 20956 1344
22 4950 152 27554 1066
23 6897 107 36231 893
24 9138 138 47639 698
25 11755 177 62640 575
26 14880 227 82364 474
27 18492 291 108300 389
28 23942 374 203398 344
29 30488 480 394836 291
30 33222 995 189191 240

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