Table 4.
Results of IVF pregnancy outcomes between treatment protocol groups obtained using generalized equation model analyses with adjusted repeated embryo transfer cycles for a given patient.
| Comparison | Ongoing pregnancy | Live birth | ||
|---|---|---|---|---|
| OR (95% CI) | p-value | OR (95% CI) | p-value | |
| Group comparison | ||||
| Study group versus control group (ref.) (180 FET cycles) | 1.13 (0.55, 2.32) | 0.7455 | 1.50 (0.65, 3.49) | 0.3429 |
| Protocol A versus protocol B (ref.) (180 FET cycles) | 0.77 (0.37, 1.58) | 0.4719 | 0.66 (0.29, 1.54) | 0.3365 |
| Subgroup comparison (ref.: study group with protocol B) | ||||
| Control group with protocol A vs. ref. (150 FET cycles) | 0.71 (0.29, 1.76) | 0.4590 | 0.5 (0.17, 1.43) | 0.1949 |
| Control group with protocol B vs. ref. (102 FET cycles) | 0.74 (0.25, 2.20) | 0.5892 | 0.47 (0.14, 1.58) | 0.2221 |
| Study group with protocol A vs. ref. (106 FET cycles) | 0.61 (0.20, 1.83) | 0.3770 | 0.47 (0.13, 1.66) | 0.2390 |
OR, odds ratio; CI, confidence interval; FET, frozen embryo transfer; study group, patients received cotreatment of clomiphene citrate and letrozole in mild ovarian stimulation; control group, patients received conventional ovarian stimulation; protocol A, patients received ovarian stimulation with gonadotropin-releasing hormone GnRH antagonist protocol; protocol B, patients received ovarian stimulation with progestin-primed ovarian stimulation (PPOS) protocol.