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. 2021 May 2;21:348. doi: 10.1186/s12884-021-03833-2

Table 3.

Clinical outcome of embryo transfer and OHSS

Fixed group
(n = 100)
Flexible group
(n = 101)
P Difference*[95% CI]
Fresh embryo transfer
 No. of embryo transferred 2.0 ± 0.1 2.0 ± 0 0.182
 Em thickness on the day of ET 9.8 ± 1.4 10.1 ± 1.3 0.130
 Implantation rate (%) 30/91 (33.0) 30/94 (31.9) 0.879 1.05 [−12.44, 14.55]
 Clinical pregnancy rate (%) 24/46 (52.2) 24/47 (51.1) 0.915 1.11 [−19.20, 21.42]
 Onging pregnancy rate (%) 20/46 (43.5) 17/47 (36.2) 0.472 7.31 [− 12.54, 27.16]
Cumulative live birth rate per patients (%) 68/100 (68.0) 69/101 (68.3)
OHSS (%)
 Mild 35 (35.0) 38 (37.6) 0.646
 Moderate 5 (5.0) 4 (4.0)
 Severe 2 (2.0) 5 (5.0)

Treatment difference = Day-5 fixed protocol – flexible protocol