Table 5.
Comparison of cycle characteristics among the three subgroups
| Group 1A | Group 1B | Group 1C | P | |
|---|---|---|---|---|
| Number | 185 | 95 | 141 | |
| E2 on the day of P administration start (pg/ml) | 292.61 ± 365.65* | 307.85 ± 510.54* | 205.37 ± 202.44 | 0.046 |
| P on the day of P administration start (ng/ml) | 0.89 ± 2.42 | 0.90 ± 1.21 | 0.91 ± 1.23 | 0.998 |
| EMT on the day of P administration start (mm) | 10.12 ± 1.57** | 10.45 ± 1.77** | 11.11 ± 1.70 | 0.001 |
| Endometrial pattern on the day of P administration start | ||||
| A endometrium on the day of P administration start (%) | 75.1% (139/185) | 72.6% (69/95) | 70.2% (99/141) | 0.610 |
| B endometrium on the day of P administration start (%) | 24.3% (45/185) | 25.3% (42/95) | 26.2% (37/141) | 0.925 |
| C endometrium on the day of P administration start (%) | 0.5% (1/185) | 2.1% (2/95) | 3.5% (5/141) | 0.110 |
| E2 on embryo transfer day (pg/ml) | 284.78 ± 219.74 | 245.72 ± 228.34 | 230.78 ± 209.31 | 0.073 |
| P on embryo transfer day (ng/ml) | 10.64 ± 6.20 | 10.99 ± 5.74 | 10.47 ± 6.09 | 0.811 |
| EMT on embryo transfer day (mm) | 9.44 ± 1.47** | 9.21 ± 1.54** | 8.61 ± 1.34 | 0.001 |
| Endometrial pattern | ||||
| A endometrium on embryo transfer day (%) | 1.6% (3/185) | 1.1% (1/95) | 1.4% (2/141) | 0.999 |
| B endometrium on embryo transfer day (%) | 23.2% (43/185) | 29.5% (28/95) | 32.6% (46/141) | 0.159 |
| C endometrium on embryo transfer day (%) | 75.1% (139/185) | 69.5% (66/95) | 66.0% (93/141) | 0.186 |
| Days of estrogen administration before P | 11.98 ± 3.28 | 11.80 ± 3.52 | 11.94 ± 3.31 | 0.909 |
*Compared with group 1C, P < 0.05
**Compared with group 1C, P < 0.01