Early decelerations of the fetal heart rate from occlusion of the umbilical cord.
D003251:Constriction, Pathologic; D005260:Female; D005318:Fetal Heart / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D007744:Obstetric Labor Complications; D011247:Pregnancy; D014470:Umbilical Cord