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.
Baseball is a game played between two teams of nine players each. The game is divided into nine innings, each divided into two halves. In the top half of the inning, the players of one team successively come to bat and attempt to score runs, while the other team plays in the field and attempts to stop the offensive team from scoring.