Table 3. Ultrasound values measured at day P, day P + 2, and day ET.
| Variable | Pregnancy | Clinical pregnancy | Ongoing pregnancy | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No (n=24) | Yes (n=61) | P | No (n=38) | Yes (n=47) | P | No (n=46) | Yes (n=39) | P | |||
| Day P | |||||||||||
| EMT, mm | 10.6±2.0 | 10.2±2.0 | 0.48 | 10.6±2.1 | 10.2±1.9 | 0.34 | 10.6±2.0 | 10.1±2.1 | 0.30 | ||
| EV, cm3 | 4.1±1.5 | 4.3±1.5 | 0.68 | 4.2±1.7 | 4.2±1.4 | 0.89 | 4.3±1.6 | 4.2±1.5 | 0.80 | ||
| VI, % | 24.9±10.0 | 26.8±12.9 | 0.52 | 25.6±10.4 | 26.8±13.4 | 0.65 | 26.8±11.9 | 25.7±12.6 | 0.67 | ||
| FI, % | 20.6±2.6 | 21.2±3.0 | 0.39 | 20.8±2.5 | 21.3±3.2 | 0.39 | 21.2±2.8 | 20.9±3.0 | 0.67 | ||
| VFI, % | 4.9 (3.1, 6.7) | 5.5 (3.2, 8.7) | 0.41 | 4.9 (3.0, 7.5) | 5.5 (3.3, 8.9) | 0.65 | 5.7 (3.0, 8.3) | 4.8 (3.3, 8.6) | 0.76 | ||
| Day P + 2 | |||||||||||
| EMT, mm | 11.1±2.9 | 10.6±2.2 | 0.05 | 11.1±2.5 | 10.5±2.3 | 0.39 | 11.0±2.3 | 10.4±2.5 | 0.55 | ||
| EV, cm3 | 4.0±1.9 | 3.8±1.4 | 0.18 | 4.1±1.7 | 3.7±1.4 | 0.14 | 4.1±1.6 | 3.7±1.4 | 0.31 | ||
| VI, % | 15.5±7.2 | 15.7±7.8 | 0.29 | 15.2±7.6 | 16.0±7.6 | 0.75 | 15.7±7.8 | 15.6±7.4 | 0.64 | ||
| FI, % | 18.6 (16.7, 20.9) | 19.3 (17.4, 20.9) | 0.47 | 18.6 (16.8, 20.9) | 19.4 (17.5, 21.0) | 0.32 | 19.3 (17.1, 21.3) | 19.2 (16.9, 20.9) | 0.71 | ||
| VFI, % | 3.0±1.7 | 3.5±2.3 | 0.09 | 3.0±1.7 | 3.7±2.5 | 0.05 | 3.2±1.8 | 3.6±2.5 | 0.18 | ||
| Day ET | |||||||||||
| EMT, mm | 11.3±2.4 | 10.9±2.4 | 0.53 | 11.1±2.5 | 10.9±2.3 | 0.47 | 11.0±2.3 | 11.0±2.5 | 0.60 | ||
| EV, cm3 | 4.1±1.8 | 4.1±1.5 | 0.43 | 4.1±1.8 | 4.0±1.4 | 0.08 | 4.2±1.7 | 4.0±1.4 | 0.20 | ||
| VI, % | 15.3±9.6 | 15.9±11.4 | 0.47 | 14.6±8.7 | 16.7±12.3 | 0.07 | 14.7±9.5 | 17.0±12.3 | 0.22 | ||
| FI, % | 17.4±4.9 | 18.4±4.0 | 0.70 | 17.7±4.6 | 18.4±4.0 | 0.97 | 18.0±4.4 | 18.2±4.1 | 0.70 | ||
| VFI, % | 2.7 (1.5, 4.4) | 2.4 (1.5, 3.6) | 0.76 | 2.7 (1.5, 3.5) | 2.4 (1.6, 4.0) | 0.89 | 2.3 (1.5, 3.5) | 2.5 (1.6, 4.0) | 0.88 | ||
Data are presented as mean ± standard deviation or median (interquartile range). EMT, endometrial thickness; EV, endometrial volume; VI, vascular index; FI, flow index; VFI, vascular flow index; day P, before progesterone administration; d P + 2, the third day after progesterone administration; day of ET, the day of embryo transplantation.