Variability of endometrial thickness during the ovulatory period in the main group of an infertility study

Mean endometrial thickness provides a concise summary of ultrasound findings but may conceal differences between individual observations. Describing the distribution can help identify the measurements that predominate and guide subsequent investigation of clinical correlates. Standardized sonographic terminology supports consistent reporting [1]. Associations with reproductive outcomes have been examined in IVF, embryo-transfer and stimulated IUI settings, which differ from the present descriptive analysis [2–4].