Histological dating of timed endometrial biopsy tissue is not related to fertility status  Christos Coutifaris, M.D., Ph.D., Evan R. Myers, M.D., M.P.H., David S. Guzick, M.D., Ph.D., Michael P. Diamond, M.D., Sandra A. Carson, M.D., Richard S. Legro, M.D., Peter G. McGovern, M.D., William D. Schlaff, M.D., Bruce R. Carr, M.D., Michael P. Steinkampf, M.D., Susan Silva, Ph.D., Donna L. Vogel, M.D., Ph.D., Phyllis C. Leppert, M.D., Ph.D.  Fertility and Sterility  Volume 82, Issue 5, Pages 1264-1272 (November 2004) DOI: 10.1016/j.fertnstert.2004.03.069 Copyright © 2004 American Society for Reproductive Medicine Terms and Conditions

FIGURE 1 Schematic representation of the study design. Randomization was performed at the time of the urinary LH surge. Fertility and Sterility 2004 82, 1264-1272DOI: (10.1016/j.fertnstert.2004.03.069) Copyright © 2004 American Society for Reproductive Medicine Terms and Conditions

FIGURE 2 Receiver operating characteristic curve for endometrial dating for all biopsies (black line), biopsies obtained in the midluteal (days 21–22) phase (green line), and biopsies obtained in the late luteal (days 26–27) phase (red line). The y-axis of the graph represents the proportion of women in each group correctly classified as infertile by a biopsy out-of-phase by more than 1 day (♢), by more than 2 days (□), by more than 3 days (▵), and by more than 4 days (X), whereas the x-axis represents the proportion of women in each group incorrectly classified as infertile in each group. The dotted diagonal line represents a test that does not discriminate between true and false positives. Fertility and Sterility 2004 82, 1264-1272DOI: (10.1016/j.fertnstert.2004.03.069) Copyright © 2004 American Society for Reproductive Medicine Terms and Conditions