Respuesta :
involves hormones- The patch delivers hormones that stop an egg from being produced.
forms a barrier- Condoms keep semen with sperm from reaching the vagina.
involves use of spermicide- A diaphragm blocks sperm from the cervix, and spermicide slows movement of sperm.
protects against STIs- Condoms help keep partners' body fluids from coming into contact.
the most effective method- Abstinence, if total and continuous, is 100 percent effective against pregnancy and STIs.
A physical, chemical, hormonal or surgical method of preventing pregnancies is called birth control. They are also called contraceptives as they prevent conception and decreases the rate of disease transmissions.
Different types of birth control and their roles:
Hormones - The original hormone balances of the female body are modified by giving either progestin and estrogen or only progesterone. They are administered via implants, pills, IUDs or skin patches.
Barrier - diaphragm, cervical caps, condoms, are some barriers that prevent the entry of sperms in the female cervix thus, preventing fertilization.
Spermicides - they kill or slow the movement of the sperm and are available in the form of gels, creams, foams etc.
Condoms - protect against the STI as it acts as a barrier and does not allow the flowed liquid to mix and cause an infection or disease.
Abstinence - is a natural method that involves abstaining from the practice of fertilization. It is most effective method and prevents STI.
Thus these are some contraceptive methods of preventing pregnancies.
Learn more about birth control methods here:
https://brainly.com/question/1593159
