Being the intrauterine system in order to inject the active material to the intrauterine, the aforementioned intrauterine system, to have with two flexible arms and the containment means of the aforementioned active material which extend to abbreviation opposite direction mutually from the center section, as for the aforementioned intrauterine system, during use period to the intrauterine the inserting and others re, the long housing, the flexible arm forming the same angle substantially, to extend from the aforementioned center section, as for the aforementioned housing, from the receptacle and the exit opening and the pump system and the aforementioned receptacle as containment means of the aforementioned active material the aforementioned exit aperturePassing by the section, control unit and the aforementioned pump system for the sending where the aforementioned active material which reaches to the uterus is controlled and energy storage means in order to supply energy to aforementioned control unit and, it has.< Choice figure >Drawing 1子宮内に活性物質を注入するための子宮内システムであって、前記子宮内システムは、中央部から互いに略反対方向に延びる2つのフレキシブルアームと、前記活性物質の保持手段とを備えており、前記子宮内システムは、使用期間中には子宮内に入れられ、細長いハウジングは、フレキシブルアームと実質的に同じ角度をなして前記中央部から延び、前記ハウジングは、前記活性物質の保持手段としての貯蔵容器と、出口開口部と、ポンプシステムと、前記貯蔵容器から前記出口開口部を通って子宮へと至る前記活性物質の制御された送り込みのための制御ユニットと、前記ポンプシステム及び前記制御ユニットにエネルギーを供給するためのエネルギー貯蔵手段と、を備えている。【選択図】図1