Cervical cancer is caused by severe abnormal changes in the cells of the cervix. Most precancerous or cancerous cell changes occur in the cervix at the transformation zone, because these cells normally undergo constant change.
A balk in baseball is any action by the pitcher that violates the balk rule, which restricts the actions of the pitcher when there is at least one runner on base. The purpose of the balk rule is to protect the runner or runners from being deceived by the pitcher.
A balk will be called when a pitcher who is on the rubber makes any motion naturally associated with his pitching delivery and does not actually deliver the ball, feigns a throw to first or third base and fails to complete the throw, or fails to step directly toward a base before throwing to that base.