Which among the following contraceptive method make the uterus unsuitable for implantation and the cervix hostile to the sperms?

Hormones releasing IUDs.

The correct answer is Option (4)-Hormones releasing IUDs.

The use of Intra Uterine Devices (IUDs) is effective and popular method used in birth control. These devices are inserted by doctors or expert nurses in the uterus through vagina. These Intra Uterine Devices are presently available as the non-medicated IUDs (e.g., Lippes loop), copper releasing IUDs (CuT, Cu7, Multiload 375) and the hormone releasing IUDs (Progestasert, LNG-20) . IUDs increase phagocytosis of sperms within the uterus and the Cu ions released suppress sperm motility and the fertilising capacity of sperms.

The hormone-releasing IUDs ,make the uterus unsuitable for implantation and the cervix hostile to the sperms. IUDs are ideal contraceptives for the females who want to delay pregnancy and/or space children.