IUDs stands for intrauterine devices. IUDs are small contraceptive devices made of plastic or metal that are put inside the female womb to obstruct fertilization and pregnancy.
Lippes loop is a non-medicated intrauterine devicesdoes not allow the fertilisation of sperm with egg in the female reproductive system. It increases the process of sperm phagocytosis as it attracts macrophages in the uterine cavity.