Question

How do Cu ions in copper releasing IUDs prevent fertilization?

(a) By reducing the motility of the sperms

(b) By increasing the motility of the sperms

(c) By causing the females to expel out the sperms

(d) By causing the lysis of sperms

I had been asked this question in my homework.

This question is from Reproductive Health topic in section Reproductive Health of Biology – Class 12

Answer 1

The correct choice is (a) By reducing the motility of the sperms

For explanation I would say: Copper releasing IUDs include Cu7, CuT, and Multiload 375. These work by dampening the motility of the sperms. This reduces the ability of sperm to cross the barriers of the uterus before reaching the fallopian tube and thus prevents fertilization and pregnancy.