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.