What type of methods generally do not protect against STIs?

Contraceptive methods primarily focus on preventing pregnancy rather than providing protection against sexually transmitted infections (STIs). While some contraceptive methods, such as condoms, may offer dual protection (preventing both pregnancy and STIs), many common contraceptives, including hormonal birth control pills, intrauterine devices (IUDs), and implants, do not provide any protection against STIs. These methods work by preventing ovulation or inhibiting fertilization, which does not impact the transmission of infections.

In contrast, barrier methods, like condoms, are specifically designed to create a physical barrier that reduces the risk of STIs. Medication methods may include antiretroviral therapy for those who are HIV-positive, which can help manage the risk of transmission. Preventive methods may encompass vaccinations for certain STIs, thus directly targeting the infections themselves. Therefore, contraception methods are not reliable for STI protection, making them the correct choice in this context.