What could be the reasons for adopting contraceptive methods?

Contraceptive methods include any approach to prevent conception; for example, oral contraceptive pills, surgical methods (vasectomy, tubal ligation), contraceptive implants, diaphragm, cervical cap, condoms, intrauterine devices etc. These methods are adopted for protection against sexually transmitted diseases, to have sufficient gap between two successive childbirth to ensure better health of mother and children, to restrict the number of kids, to enjoy reproductive health and to control exponential population growth.