<s>[INST] context: HSG A didelphic uterus results when there is failed fusion of the paired mullearian ducts. This anomaly is characterised by the presence of two endometrial cavities each with a uterine cervix. A longitudnal vaginal septum runs between the two cervices in most of the cases. "To confirm the diagnosis (of didelphic uterus) HSG is recommedned to identity the possibility of communication between the uterus." ...Williams Gynae. lle, p 417 As far as other options are concered - Laparascopy can diagnose uterine didelphys accurately but is not the procedure of choice as it is an invasive procedure. Option 'b' role of IVP in uterine anomalies is only to rule out associated renal anomalies. Option 'cl' role of USG in uterine anomalies - For identificatiion of congenital malformation, standard two -dimensional transvaginal ultrasound compliments HSG and improves diagnostic accuracy in differentiating septate and bicornuate uteri by revealing the shape of the fundal contour. . Also know : - Of all the major uterine malformations, the didelphic uterus has the best reproducjtive prognosis. - Surgery should be reserved for highly selected women in whom repeated late trimester losses or premature delivery has occured with no apparent etiology. [/INST] question: To diagnose uterus didelphys, procedure of choice is : | options: A: Laparoscopy B: IVP C: HSG D: USG | answer: C </s>