Memory Game Birth ControlOnline version Match the type to the definition. by Ashley Kreider Abstinence is the only 100% effective method for preventing pregnancy and STIs. The hormones in the implant prevent pregnancy by interrupting ovulation. The vaginal ring (inserted once a month) releases hormones that It helps to keep eggs in the ovaries. Vasectomy This hormonal birth control is taking by the mouth and helps to control ovulation. A coil is inserted into the fallopian tube to prevent the eggs from traveling to the uterus. A covering that is placed on the penis/or vagina that prevents sperm from traveling. Condom During tubal ligation, the tubes are cut, tied or blocked to permanently prevent pregnancy. Pill The vas deferens is cut in order to block the flow of sperm. This hormonal form of birth control is inserted in the uterus. It makes the uterus unable to sustain life