Table 2. Distribution and CLBR in POSEIDON groups
Group n % a,b % groups MC LB FET MC-FET LB-FET CLBR a,b CLBR groups p value
    1a 1 1.9% 20.4% 0 0 0 0 0 0.0% 45.5% (5/11) 0.337
    1b 10 18.5% 0 5 1 0 0 50.0%
    2a 7 13.0% 31.5% 0 1 1 0 0 14.3% 29.4% (5/17) 1.000
    2b 10 18.5% 0 4 1 0 0 40%
    3 8   14.8% 0 2 0 0 0   25.0% (2/8) 1.000
    4 18   33.3% 0 2 1 0 0   11.1% (2/18) 0.069
Not Poseidon 358     16 102 55 2 15   32.7% (117/358) 0.351

n, number of cases; % a,b, percentage of cases in groups a and b; % groups, percentage of cases in groups 1-4; MC, miscarriage; LB, live birth; FET, frozen embryo transfer; MC-FET, miscarriage after FET; LB-FET, LB from FET; CLBR a,b, cumulative live birth rate in groups a and b; CLBR groups, CLBR in POSEIDON groups.