Hormonal Releasing IUD. is LNG-20. Hormonal releasing IUDs. Intra Uterine Devices (IUDs) for contraception (i) There devices are inserted by the doctors into the uterus through vagina. (ii) There are three types of IUDs Non-medicated IUDs They increases the phagocytosis of the sperm within the uterus, $e.g.,$ Lippes loop Copper Releasing IUDs Along with phagocytosis of the sperms, the copper ions released, suppresses the sperm motility and the fertilizing capacity of the sperm. $e.g.,$ Cu-T, Cu-7, multiload-375 Hormone Releasing IUDs They makes the uterus unsuitable for implantation and the cervix hostile to the sperms, $e.g$, progestasert, LNG-20