<unk>  is a contraceptive substance that destroys sperm, inserted vaginally prior to intercourse to prevent pregnancy. As a contraceptive,<unk>  may be used alone. However, the pregnancy rate experienced by couples using only<unk>  is higher than that of couples using other methods. Usually,<unk> s are combined with contraceptive barrier methods such as diaphragms, condoms, cervical caps, and sponges. Combined methods are believed to result in lower pregnancy rates than either method alone.<unk> s are unscented, clear, unflavored, non-staining, and lubricative.
Spermicide
Male contraceptive
Female condom
Extended cycle combined hormonal contraceptive
Phytoprogestogen
Antiprogestogen
Heat-based contraception
Pessary