What are the benefits of using mechanical barriers during sexual act?

List four categories of contraceptive methods. State in brief two advantages of adopting such preventive methods.

The spherical bacteria of the species $Neisseria$ $gonorrhoeae$ are responsible for which sexually transmitted disease in humans?

Why do we need to adopt contraceptive measures?

Which of the following sexually transmitted diseases is caused by a virus?

List four points of significance of reproductive health in a society. Name any two areas related to reproductive health which have improved over the past $50$ years in our country.