Table 4.
Comparison of endometrial receptivity parameters among the four groups.
| Parameters | No pregnancy group (n=72) | Biochemical pregnancy group (n=51) | Clinical pregnancy group (n=39) | Ongoing pregnancy group (n=34) | P valuea |
|---|---|---|---|---|---|
| Ultrasonic parameters | |||||
| Uterine PI | 2.2 ± 0.5 | 2.1 ± 0.5 | 2.0 ± 0.6 | 2.1 ± 0.7 | 0.587 |
| Uterine RI | 0.8 ± 0.3 | 0.8 ± 0.3 | 0.8 ± 0.3 | 0.8 ± 0.2 | 0.324 |
| ET (mm) | 9.6 ± 2.3 | 9.9 ± 2.9 | 10.2 ± 3.0 | 9.9 ± 2.8 | 0.225 |
| EV (cm3) | 2.8 ± 0.8 | 2.9 ± 0.9 | 2.9 ± 0.8 | 3.0 ± 0.9 | 0.210 |
| VI (%) | 1.5 ± 0.6 | 2.2 ± 0.8★ | 2.5 ± 0.8★ | 2.9 ± 0.9★▲ | 0.044 |
| FI (0-100) | 14.4 ± 4.7 | 20.5 ± 5.1★ | 23.8 ± 5.7★ | 28.6 ± 5.9★▲ | 0.036 |
| VFI (0-100) | 0.2 ± 0.1 | 0.5 ± 0.2★ | 0.6 ± 0.3★ | 0.8 ± 0.4★▲ | 0.017 |
| Biomarkers (pg/mL) | |||||
| Integrin αvβ3 | 11.2 ± 3.9 | 26.8 ± 7.3★ | 32.6 ± 7.4★ | 40.3 ± 10.2★▲ | 0.015 |
| VEGF | 16.7 ± 5.1 | 29.5 ± 9.4★ | 41.5 ± 10.9★ | 50.2 ± 11.5★▲ | 0.020 |
Data given as mean ± SD. aVariance analysis among the three groups. Vs. no pregnancy group, ★P<0.05. Vs. biochemical pregnancy group, ▲P<0.05.