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Comparison of zone of endometrial perfusion in 2 study group
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| Endometrial grade | Group I (n = 74) | Group II (n = 176) | P-value |
| Zone 1 (n = 93) | 10/74 (13.5) | 83/176 (47.2) | |
| Zone 2 (n = 115) | 38/74 (51.4) | 77/176 (43.8) | |
| Zone 3 (n = 42) | 26/74 (35.1) | 16/176 (9.1) | 0.001 |
| Data presented as n (%). Chi-square test | |||
