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