Contraceptives are methods or devices used to prevent pregnancy during sexual intercourse. They work by either blocking sperm from reaching an egg, preventing ovulation, or creating an environment that is not suitable for fertilization. Common types of contraceptives include birth control pills, condoms, IUDs (intrauterine devices), and implants. Using contraceptives can help individuals and couples plan their families and avoid unintended pregnancies. They can also provide additional health benefits, such as regulating menstrual cycles or reducing the risk of certain diseases. It is important to choose a method that suits personal health needs and lifestyle.