| Table 2. Association between embryo transfer difficulty (easy vs. difficult) and clinical pregnancy rate (CPR) using multivariable logistic regression, adjusted for various covariates. Results are presented as adjusted odds ratios (aOR) with 95% confidence intervals (CI). |
| CPR |
aOR |
Lower 95% CI |
Higher 95% CI |
p
value |
| Difficult embryo transfer |
0.494425 |
0.2208586 |
1.106844 |
0.087 |
| Embryo stage (blastocyst) |
1.982198 |
1.055628 |
3.72206 |
0.033 |
| Embryo quality (good) |
1.148255 |
1.041447 |
1.266018 |
0.006 |
| Number of embryos transferred |
1.734022 |
1.281845 |
2.345706 |
<0.001 |
| Estradiol (E2) level |
0.9999805 |
0.9999389 |
1.000022 |
0.36 |
| Stimulation protocol (long GnRH agonist) |
0.6278077 |
0.1427636 |
2.760805 |
0.538 |
| Day-3 follicle stimulating hormone (FSH) level |
0.9655042 |
0.903558 |
1.031697 |
0.299 |
| Day-3 luteinizing hormone (LH) level |
1.000152 |
0.9941476 |
1.006192 |
0.961 |
| Age |
0.9721103 |
0.9291452 |
1.017062 |
0.22 |