Cervix @ was @ + / - @ mm and @ + / - @ mm ( p = @ ) , cervix @ was @ + / - @ mm and @ + / - @ mm ( p = @ ) and cervical shortening was @ + / - @ mm and @ + / -@ mm ( p = @ ) , time to onset of labor was @ + / - @ and @ + / - @ ( p = @ ) and duration of labor was @ + / - @ and @ + / - @ ( p = @ ) for the sweeping and the control groups , respectively