Extra-amniotic balloon for preinduction cervical ripening: a randomized comparison of weighted traction versus unweighted.

Objective: To determine whether a weighted versus unweighted balloon catheter achieved a shorter first stage of labor.

Methods: This was a randomized trial of patients undergoing induction with Bishop score <4. Women were randomized to weighted balloon catheter with 1000 mL fluid bag or unweighted catheter taped to the thigh.