NEETZoologyReproductive Health
Which of the following best describes the primary mechanism of action of the contraceptive device Multiload 375?
Options
- AIt primarily increases phagocytosis of sperms within the uterus without releasing any ions.
- BIt releases copper ions that suppress sperm motility and the fertilising capacity of sperms.
- CIt makes the uterus unsuitable for implantation and the cervix hostile to sperms.
- DIt inhibits ovulation and implantation by altering systemic hormone levels.
Correct answer
B. It releases copper ions that suppress sperm motility and the fertilising capacity of sperms.
Step-by-step solution
Multiload 375 is a copper-releasing Intra-Uterine Device (IUD). According to NCERT, copper-releasing IUDs (such as CuT, Cu7, and Multiload 375) release Cu ions which suppress sperm motility and the fertilising capacity of sperms. Increasing phagocytosis without releasing ions is the mechanism of non-medicated IUDs (e.g., Lippes loop). Making the uterus unsuitable for implantation is the mechanism of hormone-releasing IUDs (e.g., Progestasert, LNG-20). Inhibiting ovulation is the primary mechanism of oral contracept