For external use spermicides is a very common contraceptive methods, suppositories, tablets, film, vaginal gel and sponge side, and other means. It through chemical action, in the female reproductive tract to kill sperm, or sperm can not swim, so as to achieve the purpose of contraception. When not in use because of the impact of the couple's pleasure, and in the vagina may play the role of lubrication to ease the pain of female sexual intercourse, the couple became more and more contraceptive choices. However, the use of spermicides alone contraceptive effect is not reliable. Beijing Maternity Hospital's Dr. Zhang Jianping, told reporters, the survey shows that the use of a separate external use of contraceptive spermicides, the effective rate was only about 70%, well below the 98% of the condom, the pill and other methods of 99%. For external use as spermicides into the vagina, to wait for 5-10 minutes can be an effective, efficient and time, only about 1 hour. In addition, because the position , it will result in the loss of the drug can not be reached to kill or inhibit sperm motility of sperm. When the vaginal secretions of women less, will affect some of the external use of spermicides melting which in turn will affect the use of spermicides effect. Experts suggested that the best spermicides and other contraceptive methods, such as condoms, contraceptive diaphragm combination. To contraceptive diaphragm, for example, the use of spermicides first time in the patch applied on both sides to avoid sperm from a vaginal contraceptive diaphragm and the gap between the adoption of, and then paste the lack of effect will be very good. In addition, the external use of spermicides, must remain slightly into the vagina after, until fully dissolved after sex life. Different brands of spermicides dissolved different time, before using the statement read. Part of the female external use spermicides allergy, if there are local skin burning, tingling, must stop using the law for other methods of contraception.
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