Inserter

A method of preventing pregnancy or providing contraception in a patient, comprising:

• (a) providing an intrauterine system having a reservoir containing a hormone and a removal string attached to the intrauterine system;
• (b) holding an inserter in one hand, the inserter comprising:
• a handle comprising a movable slider arranged in a longitudinal opening;
• a plunger attached to the handle;
• an insertion tube attached to the slider;
• and
• a lock arranged inside the handle, the lock being controllable by the slider,
• wherein the lock comprises:
• a first locking part and a second locking part movably mounted inside the handle and arranged in a first position of the slider to be essentially in contact with each other to form a blocking and lock the intrauterine system in relation to the plunger via the removal string;
• and
• a first protrusion and a second protrusion arranged inside the handle,
• wherein the first and second protrusions are arranged to move the first and second locking parts in response to movement of the slider to a second position and release the removal string and intrauterine system;
• (c) introducing the inserter into a uterus of the patient with the one hand;
• and
• (d) moving the slider with one digit of the one hand, thereby releasing the removal string and intrauterine system within the uterus.