Condom is the most useful contraceptive method to control STDs as well as unwanted pregnancy.

Explanation:

- Condom is a type of barrier contraceptive method that physically blocks the exchange of bodily fluids during sexual intercourse. This helps to prevent the transmission of sexually transmitted infections (STIs), including HIV, chlamydia, gonorrhea, and syphilis, as well as unwanted pregnancy.
- Condoms are made of latex or polyurethane and are designed to fit over the penis during intercourse. They can also be used for oral and anal sex to reduce the risk of STIs.
- Condoms are easily accessible, affordable, and do not require a prescription or medical consultation. They can be purchased at drug stores, supermarkets, and online retailers.
- Condoms are also user-controlled, meaning that both partners can take responsibility for their sexual health by using condoms consistently and correctly.
- Other contraceptive methods, such as tubectomy, Copper-T, and oral pills, do not provide protection against STIs and are primarily used for preventing pregnancy. Tubectomy involves surgical sterilization of the fallopian tubes in women, while Copper-T is an intrauterine device (IUD) that releases copper ions to prevent fertilization. Oral pills contain hormones that prevent ovulation and thicken cervical mucus to block sperm from reaching the egg.
- However, condoms are not 100% effective in preventing STIs or unwanted pregnancy, and can break or slip off during intercourse. Therefore, it is important to use condoms in combination with other contraceptive methods, such as hormonal birth control or IUDs, and to get regular STI testing and treatment.