What is the primary purpose of female sterilization (tubectomy)?

The contraceptive pills for females are composed of . . . . . . .

Contraceptive pills are very effective with lesser side effects and are well accepted by females. They work by:

Nirodh is a popular brand of .....

The technique used to block the passage of sperm in males is . . . . . . .

Use of which of the following contraceptive devices has increased in recent years due to its additional benefit of protecting the user from contracting $STDs$ and $AIDS$?