Objective and comprehensive characterization of uterine peristaltic activity throughout the menstrual cycle by means of intracavitary electrohysterography, a cohort study

IC-EHG technique enables objective, reproducible, and quantitative assessment of multiple aspects of uterine peristalsis, revealing distinct regional and cycle-phase-dependent patterns. The decline in most contractile features during the LL phase supports the physiological uterine quiescence required for embryo implantation. The uterine fundus is more active during the MF phase. This study provided reference values for healthy, fertile conditions and could inform further investigation of alterations due to disorders or intervention strategies.