cornual pregnancy /kôr″nyo̅o̅·əl/ [L, cornu, horn, praegnans, childbearing] , an ectopic pregnancy in one of the straight or curved extensions of the body of the uterus. The signs include a uterus that is asymmetric and tender, as well as cramping and spotting. The cornu of the uterus usually ruptures between 12 and 16 weeks of the pregnancy unless the condition is treated surgically to remove the products of conception. In most cases the uterus can be repaired. Also called interstitial pregnancy. See also ectopic pregnancy.