Table 2. Variables that may affect the results in the two luteal phase groups (control group and hCG group).
Variables CG n=60 hCG n=62 OR (95%IC) Q
Age * 32.53±3,20 30.91±3.69 0.0114
Cycles with prior implantation failure 8 (13.33%) 6 (9.67%) 1.436 (0.439-4.567) 0.5799
E2 DT +6 * (pg/ml) 267.84±169.12 300.09±213.23 0.5206
Progesterone DT +6 * (ng/ml) 16.5±10 12.3±8.49 0.7529
b-hCG * +6 (mIU/ml) 35.4±84.2 48.5±54.2 0.8954
Day-3 embryo transfer (%) 2 (3.33%) 01 (1.61%) 2.103 (0.238-30.92) 0.6157
Day-4 embryo transfer (%) 13 (21.66%) 12 (19.35%) 1.152 (0.4951-2.660) 0.8243
Embryo transfer on days 5-6 (%) 47 (78.33%) 49 (79.03%) 0.9592 (0.4077-2.268) >0.9999
Embryos transferred * 1.95±0,64 2.16±0.54 0.0542
Endometrium (mm) * 9.38±1.97 9.16±1.53 0.5206
Transfer of 2 top embryos (%) 25 (41.66%) 25 (40.32%) 1.057 (0.4988-2.245) >0.9999
Transfer of 1 top embryo (%) 35 (58.33%) 37 (59.67%) 0.9459 (0.4454-2.005) >0.9999

OR=odds ratio; CG=control group
* mean and standard deviation.
E2= estradiol; DT+6= 6 days after embryo transfer.