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T-shaped uterus and subtle uterine variances: a need for reliable criteria

      The ASRM Class VII, the ESHRE/ESGE Class U1, and the T-shaped uterus have a uniquely interesting history. The T-shaped uterus was first described as a diethylstilbestrol- (DES-) related congenital uterine anomaly based on findings from hysterosalpingography by Kaufman in 1977. Together with two similar morphologic forms of the uterus—constricting bands in the uterine cavity and a widening of the lower two-thirds of the uterus—this was included as a separate class of DES-related anomalies by the Buttram and Gibbons 1979 classification, and its further modification—the American Fertility Society classification.
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