A female seeking a suitable contraceptive method is advised by her doctor to use a device that primarily works by making the uterus unsuitable for implantation and the cervix hostile to the sperms. Which of the following devices should be prescribed to her?

Step-by-step solution

The mechanism described (making the uterus unsuitable for implantation and the cervix hostile to the sperms) is characteristic of hormone-releasing Intra Uterine Devices (IUDs). Progestasert and LNG-20 are examples of hormone-releasing IUDs. Multiload 375 is a copper-releasing IUD, which suppresses sperm motility and fertilising capacity. Lippes loop is a non-medicated IUD that increases phagocytosis of sperms within the uterus. Vaults are barrier methods of contraception that prevent the physical meeting of sperms