Creates a suction barrier around cervix, prohibiting sperm from penetrating. No Increased risk of vaginal infection. Moderate Can be inserted up to 24 hours before intercourse. Increases risk of abnormal pap. Difficult to ensure proper insertion.
Insertion requires comfort with body.
Must be used immediately before contact with partner's genitals. Creates a barrier. Must be used immediately before contact with partner's genitals. Suppresses ovulation, inhibits uterine lining buildup, thickens cervical mucous. No Vary based on individual risk factors.