Summary: The role of a uterine septum, and thus, metroplasty in an infertile woman is a debatable issue. A rare complication of fetal malpresentation and impaction in the uterine cavity due to undiagnosed uterine septum in a 24‐year‐old primigravida who conceived after 3 years of primary infertility is reported. This case highlights that uterine anomalies should be looked for in patients with infertility and reproductive failures, and should be corrected before conception by metroplasty in order to improve reproductive outcome.