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The diaphragm is a cervical barrier type of birth control. It is a soft latex or silicone dome with a spring molded into the rim. The spring creates a seal against the walls of the vagina. ==Use== Before inserting or removing a diaphragm, one should first wash one's hands to avoid introducing harmful bacteria into the vaginal canal. The rim of a diaphragm is squeezed into an oval or arc shape for insertion. A water-based lubricant (usually spermicide) may be applied to the rim of the diaphragm to aid insertion. One teaspoon (5 mL) of spermicide may be placed in the dome of the diaphragm before insertion, or with an applicator after insertion. The diaphragm must be inserted sometime before sexual intercourse, and remain in the vagina for 6 to 8 hours after a man's last ejaculation. For multiple acts of intercourse, it is recommended that an additional 5 mL of spermicide be inserted into the vagina (not into the dome—the seal of the diaphragm should not be broken) before each act. Upon removal, a diaphragm should be cleansed with warm mild soapy water before storage. The diaphragm must be removed for cleaning at least once every 24 hours〔 and can be re-inserted immediately. Oil-based products should not be used with latex diaphragms. Lubricants or vaginal medications that contain oil will cause the latex to rapidly degrade and greatly increases the chances of the diaphragm breaking or tearing.〔 Natural latex rubber will degrade over time. Depending on usage and storage conditions, a latex diaphragm should be replaced every one to three years. Silicone diaphragms may last much longer—up to ten years. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Diaphragm (contraceptive)」の詳細全文を読む スポンサード リンク
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