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