Table 4 Univariate analysis of live birth rate

Age (years)

0.926(0.880,0.975)

0.003^*

BMI (kg/m2)

1.050(0.996,1.106)

0.069^*

Infertility duration (years)

0.922(0.847,1.004)

0.061^*

Basal FSH (IU/L)

0.957 (0.852,1.075)

0.461

Types of infertility (%)

0.977(0.659,1.449)

0.907

Initial dose of Gn (IU)

0.994(0.991,0.998)

0.001^*

Days of Gn used (IU)

0.922(0.829,1.025)

0.135

Total dose of Gn (IU)

1.000(0.999,1.000)

0.002^*

level of E2 on hCG day (ng/ml)

1.000(1.000,1.000)

0.075^*

Endometrial thickness (mm)

0.985(0.919,1.056)

0.676

Transferred embryo stage (%)

0.781(0.523,1.167)

0.228

Type of embryo transfer (%)

0.968(0.651,1.437)

0.870

Number of transferred embryos (%)

0.924(0.624,1.367)

0.691

Approach of fertilization

0.521(0.310,0.878)

0.014^*

Previous CT infection

0.648(0.417,1.007)

0.054^*