The present invention relates to novel intrauterine systems and to methods for manufacturing these systems. An intrauterine system according to the invention comprises a reservoir and a continuous, closed and flexible frame.本發明係關於新穎子宮內系統及用於製造此等系統之方法。根據本發明之子宮內系統包含一儲集器及一連續、閉合且可撓的框架。