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The malformations and deformities of the uterus, varying in degree from the almost complete absence of that organ to the very rare cases of its duplication, known as duplex uterus (dihysteria, didelphys), are of intense interest because of their clinical and pathologic aspects. These malformations are due, on the one hand, to the imperfect development of the Müllerian ducts and are classed as uterus deficiens, uterus rudimentarius, uterus fetalis, and uterus unicornis, and, on the other, to the imperfect blending or non-union of those two ducts, which normally fuse during the third fetal month to form the uterus and vagina. The latter malformations result in the so-called double uterus, and embrace the uterus septus, the uterus bicornis, and the uterus duplex separatus or didelphys, of which the case to be recorded is an example.
In the uterus septus, the uterus is divided internally by a septum of which there is
FRAZIER CH. DUPLEX UTERUS (DIDELPHYS). JAMA. 1912;LVIII(15):1112–1114. doi:10.1001/jama.1912.04260040128010
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