Table 3.
Odds of ongoing pregnancy by timing of FET, after stratification by trigger medication, endometrial preparation protocol, and use of PGS
| n (OPR) | Immediate | Delayed | CMH* |
|---|---|---|---|
| Trigger medication, n (%) | OR 1.48 | ||
| hCG | 30/48 (62.5) | 106/160 (66.3) | p = 0.17 |
| GnRH agonist | 15/27 (55.6) | 60/93 (64.5) | |
| Dual trigger | 1/5 (20.0) | 10/11 (90.9) | |
| Endometrial prep protocol, n (%) | OR 1.67 | ||
| Natural | 35/58 (60.3) | 68/96 (70.8) | p = 0.088 |
| Programmed | 11/22 (50.0) | 108/168 (64.3) | |
| PGS, n (%) | OR 1.48 | ||
| Yes | 13/24 (54.2) | 61/91 (67.0) | p = 0.172 |
| No | 33/56 (58.9) | 115/173 (66.5) |
CMH Cochran-Mantel-Haenszel
*Cochran-Mantel-Haenszel test of conditional independence; homogeneity across strata confirmed with non-significant Breslow-Day test for each variable