List four methods of contraception used by humans. How does their use have a direct effect on the health and prosperity of a family?

Four methods of contraception are: Barrier method: use of condoms. Surgical methods: vasectomy (in male), tubectomy (in female). Intrauterine devices: copper T. Oral contraception: oral hormonal pills. These methods help to take care of mother and child. It also helps in maintaining a gap between the children so that they can use resources properly.