Table 6.
Comparison of cycle characteristics among the three subgroups
| 3A | 3B | 5A | 5B | P | |
|---|---|---|---|---|---|
| n | 306 | 792 | 115 | 207 | |
| E2 on day of start P administration (pg/ml) | 258.38 ± 369.29 | 291.83 ± 275.06 | 289.30 ± 350.19 | 308.73 ± 315.50 | 0.281 |
| P on day of start P administration (ng/ml) | 0.94 ± 2.08 | 0.71 ± 0.84 | 0.79 ± 1.00 | 0.79 ± 1.23 | 0.067 |
| Endometrial thickness on day of start P administration (mm) | 10.60 ± 1.75 | 9.60 ± 1.65 | 10.31 ± 1.59 | 9.41 ± 1.52 | 0.001 |
| Endometrial pattern on day of start P administration | |||||
| A endometrium on the day of P administration start (%) | 74.8% (229/306) | 80.2% (635/792) | 67.8% (78/115) | 76.8% (159/207) | 0.013 |
| B endometrium on the day of P administration start (%) | 24.2% (74/306) | 19.6% (155/792) | 27.8% (32/115) | 22.2% (46/207) | 0.121 |
| C endometrium on the day of P administration start (%) | 1.0% (3/306) | 0.3% (2/792) | 4.3% (5/115) | 1.0% (2/207) | 0.001 |
| E2 on embryo transfer day (pg/ml) | 257.68 ± 209.40 | 322.34 ± 314.42* | 258.43 ± 244.19 | 293.74 ± 265.10 | 0.002 |
| P on embryo transfer day (ng/ml) | 10.81 ± 5.92 | 10.60 ± 6.50 | 10.27 ± 6.40 | 10.27 ± 5.26 | 0.739 |
| Endometrial thickness on embryo transfer day (mm) | 9.19 ± 1.50 | 10.15 ± 1.68** | 8.90 ± 1.43 | 10.28 ± 1.67 | 0.001 |
| Endometrial pattern | |||||
| A endometrium on embryo transfer day (%) | 1.3% (4/306) | 0.8% (6/792) | 1.7% (2/115) | 0.5% (1/207) | 0.378 |
| B endometrium on embryo transfer day (%) | 26.1% (80/306) | 28.2% (223/792) | 32.2% (37/115) | 32.4% (67/207) | 0.364 |
| C endometrium on embryo transfer day (%) | 72.5% (222/306) | 71.1% (563/792) | 66.1% (76/115) | 67.1% (139/207) | 0.396 |
| Days of estrogen administration before P | 11.97 ± 3.34 | 11.84 ± 3.30 | 11.80 ± 3.34 | 11.88 ± 3.40 | 0.940 |
*Compared with group 3A, P < 0.05
**Compared with group 3A, P < 0.01