Abstract Background Retrocaval ureter was diagnosed in a woman complaining of ureteric pain in the last trimester of pregnancy. We describe the rationale behind the administration of epidural analgesia for her colic attack. Case presentation A 41-year-old pregnant woman was hospitalized with a diagnosis of a marginal placenta previa at 34 weeks and 5 days of pregnancy. https://www.diegojavierfares.com/