NEETZoologyReproductive Health
Which of the following contraceptive devices makes the uterus unsuitable for implantation and the cervix hostile to the sperms?
Options
- ALippes loop
- BMultiload 375
- CVaults
- DLNG-20
Correct answer
D. LNG-20
Step-by-step solution
Intra Uterine Devices (IUDs) are classified into three main types based on their mechanism of action. Non-medicated IUDs (e.g., Lippes loop) increase phagocytosis of sperms within the uterus. Copper-releasing IUDs (e.g., CuT, Cu7, Multiload 375) release copper ions that suppress sperm motility and fertilising capacity. Hormone-releasing IUDs (e.g., Progestasert, LNG-20) make the uterus unsuitable for implantation and the cervix hostile to the sperms. Vaults are a barrier method, not an IUD. Therefore, LNG-20 is the