Female genital tract anomalies: ESHRE ESGE classification system

ESHRE/ESGE classification of uterine anomalies: schematic representation. (Class U2: internal indentation >50 percent of the uterine wall thickness and external contour straight or with indentation <50 percent; Class U3: external indentation >50 percent of the uterine wall thickness; Class U3b: width of the fundal indentation at the midline >150 percent of the uterine wall thickness.)