title: Ultrasonic demonstration of myometrial contractions in intrauterine pregnancy.
abstract: An incidental finding associated with ultrasound examination of early intrauterine pregnancy is transient thickening of a limited region of the myometrium, which we interpret as a localized contraction. Contractions were demonstrated in nearly all 881 patients examined and were shown to significantly change in configuration within a 30 min period. In all except one patient, the contractions were completely asymptomatic, and they seem to be of no discernible clinical significance.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005865:Gestational Age; D006801:Humans; D008875:Middle Aged; D011247:Pregnancy; D014463:Ultrasonography; D014590:Uterine Contraction