Table 3 Clinical outcomes among the different groups

Number of transfer cycles

939

1224

1598

—

Number of clinical pregnancy cycles

490 (52.2)^a,b

751(61.4)^c

1068(66.8)^d

< 0.001

Number of ectopic pregnancy cycles

8 (1.6)

9 (1.2)

6 (0.6)

0.102

Number of miscarriage cycles

79 (16.1)

126 (16.8)

164 (15.4)

0.711

Number of termination of pregnancy cycles

1 (0.2)^b

5 (0.7)^b,c

19 (1.8)^c

0.008

Number of live birth cycles (per transfer cycle)

401 (42.7)^b

609 (49.8)^c

878 (54.9)^d

< 0.001