Table 2. Endometrial thickness and pattern comparison between groups.
| Parameters | Infertile group | Healthy control | P |
|---|---|---|---|
| Endometrial thickness | |||
| Proliferative (cm) | 0.61 (0.47–0.82) | 0.67 (0.52–0.85) | 0.323 |
| Secretory (mm) | 0.94±0.27 | 1.00±0.28 | 0.346 |
| Proliferative phase pattern | 0.446 | ||
| A | 1 | 2 | |
| B | 51 | 23 | |
| C | 10 | 4 | |
| Secretory phase pattern | 0.202 | ||
| A | 1 | 1 | |
| B | 45 | 18 | |
| C | 6 | 7 |
Data are presented as median (interquartile range), mean ± standard deviation or number. Type A: triple-line pattern (hyperechoic outer and central lines with a hypoechoic area in between); Type B: uniform intermediate echogenicity with indistinct central line; Type C: homogeneous hyperechogenicity without visible central line.