Endometrial scratching in women undergoing IVF/ICSI: an individual participant data meta-analysis.

The one-stage AT and AT+ET analyses, as well as the two-stage ITT, AT, and AT+ET analyses, yielded similar results as the primary one-stage ITT model, with OR varying between 1.22 and 1.28, and 95% CIs hovering just above and just below the significance level ( Table 6 , Fig. 3 , Supplementary Figs S1 and S2 ).

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