A 21-year-old gravida 2, para 1-0-0-1 woman came in to establish prenatal care with our institution. She had a history of a prior term cesarean delivery with a uterine didelphys. The operative dictation report from her prior cesarean delivery described a neonate delivered from the right horn of her uterus with a nonpregnant well-developed left horn. The patient did not have imaging in the nongravid state to confirm the congenital uterine variation; therefore, a uterine didelphys or bicornuate uterus remained possible diagnoses.
At 12 weeks’ gestation, the patient presented for ultrasonography and was diagnosed as having dichorionic diamniotic twins with 1 fetus in each uterus. A dividing membrane could not be visualized between the 2, confirming that the fetuses were not in the same uterine cavity. The patient returned at 19 weeks’ gestation and the cervical length was found to be normal. Ultrasonographic findings suggested 2 cervical canals in close...
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