Table 4. Cycle results with any number of embryos transferred.
Group 1
(Did not fly)
Group 2
(Flew)
Crude Adjusted
Effect (95% CI) p value Relative risk
(95% CI)
p value
Pregnancy rate [RR]
General group
At least one top embryo

1086 (61.99%)
360 (71.71%)

238 (62.14%)
74 (70.48%)

1 (0.92;1.08)
1.02 (0.89;1.16)

0.95
0.80

1 (0.91;1.0.9)
1.03 (0.89;1.20)

0.94
0.69
Implantation rate [Relative Mean]
General group
At least one top embryo

1006 (38.65)
348 (46.59%)

204 (34.58)
68 (43.04%)

1.12 (0.96;1.29)
1.08 (0.87;1.34)

0.12
0.47

1.08 (0.94;1.25)
1.06 (0.84;1.33)

0.28
0.64
Miscarriage rate [RR]
General group
At least one top embryo

189 (28.51%)
55 (26.83%)

52 (32.5%)
16 (30.77%)

0.88 (0.68;1.14)
0.87 (0.55;1.39)

0.32
0.56

0.88 (0.68;1.14)
0.87 (0.54;1.4)

0.32
0.56