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Table 4 Pregnancy rates below and above 11 mm endometrial thickness

From: The correlation between endometrial thickness and outcome of in vitro fertilization and embryo transfer (IVF-ET) outcome

Endometrial thickness on day of HCG Group A (n) Group B (n) Pregnancy rate
< 11 mm 283 634 30.90%
≥ 11 mm 599 948 38.70%
Total 882 1582 35.80%
  1. P = 0.001
  2. RR = 1.25, (95% CI 1.12–1.41)