A contraceptive device intended to be introduced (non-surgically implanted) within the uterine cavity close to the fundus to prevent conception. It is typically made of plastic and has a hormone cylinder that releases a progestin (e.g., levonorgestrel) to prevent pregnancy through several possible physiological mechanisms (e.g., reduced ovulation, production of sperm-obstructing cervical mucus). Upon deployment within the uterus it opens to a prefixed shape (e.g., T-shaped) to hold it in situ, and typically includes a thread for extraction. Commonly known as an IUD, it is fitted by a healthcare professional typically with included devices (e.g., introducer). This is a single-use device.