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A cornual pregnancy is a type of ectopic pregnancy where a fertilized egg implants in the side of a uterus that is abnormally shaped, specifically a bilobed or bicornate uterus. This differs from other ectopic pregnancies, such as tubal pregnancies where implantation occurs in the fallopian tube, or abdominal pregnancies where implantation is in the abdominal cavity. Ectopic pregnancies, including cornual ones, are serious conditions that can lead to significant internal bleeding and are a major cause of maternal mortality in the first trimester of pregnancy. Treatment typically involves prompt surgical intervention.12

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