Gestational week :

9w-9w+6d    : 63340-207698(Median:88163)
10w-10w+6d : 33834-177439(Median:86809)
11w-11w+6d : 40688-120897(Median:73006)
12w-12w+6d : 33385-110017(Median:63580)
13w-13w+6d : 26840-108394(Median:56557)
14w-14w+6d : 19010-53637(Median:35257)
15w-15w+6d : 12791-69736(Median:29086)
16w-16w+6d : 9589-64731(Median:24482)
17w-17w+6d : 7915-42725(Median:21112)
18w-18w+6d : 6294-42580(Median:16317)
19w-19w+6d : 7899-34310(Median:13668)
20w-20w+6d : 9148-27818(Median:12983)