In the table below, name and briefly describe a form of birth control that matches each description on the left. some forms of birth control can be described by more than one characteristic.

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.

it keeps oxygen levels low throughout the body