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Many thanks Useful three Not Useful 0 When you or your husband or wife has an allergy to latex, get the alternative polyurethane condoms. Other available choices are nitrile and lambskin condoms, but remember that lambskin condoms usually do not reduce the transmission of STDs and so are only employed to forestall pregnancy.
确保安全套能够在没有额外润滑的情况下使用是科学家们关注的另一个挑战。美国波士顿大学的一组研究人员开发出了一种涂在安全套上的涂料，可以使安全套具有自润滑功能。
如今的避孕套的产品多为天然乳胶材质。天然乳胶有五千至七万纳米的自然裂缝，因为人类精子的前端的直径约为五千纳米，所以可以有效地阻止精子进入女性的阴道内，起到避孕的效果。但是一些传染性的性病的病毒的直径比天然乳胶的自然裂缝要小的多，比如艾滋病病毒的直径仅为一百二十纳米，而乙肝病毒中的大球形颗粒的直径就更小了，仅为四十二纳米。由此我们可以看出，因为导致性病传播的病毒体积小于天然乳胶的自然裂缝，所以即使我们在性行为过程中使用了避孕套，仍然有一定的几率患上性病。
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Keep reading to learn the way to properly use outside and inside of condoms and dental dams, what to do In case the condom breaks, and more.
Condom measurement is important for making certain the condom is effective in blocking sexually transmitted bacterial infections (STIs) and pregnancy.
避孕套的厚薄直接影响阴茎的敏感度。一般来说，避孕套越厚阴茎的敏感度越低，快感越少。当然对于射精快的人而言，厚的避孕套则能延长射精时间。
是一种临时性避孕方法，适用于未恢复月经的产妇。在此期间，不会产生卵子，因此无法怀孕。
Guideline the penis or sex toy inside you. It’s essential to use your hand to manual the penis or sexual intercourse toy inside you to ensure it doesn’t end up sliding outdoors the condom pouch.[33] X Research source
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In the course 避孕套 of Entire world War I, the U.S. navy was the sole one which did not advertise condom use. Posters including these had been meant to endorse abstinence. Commencing in the next half of your nineteenth century, American costs of sexually transmitted infections skyrocketed. Causes cited by historians involve the results in the American Civil War as well as the ignorance of prevention solutions promoted with the Comstock legal guidelines.[104]: 137–8, 159 To struggle the increasing epidemic, sex instruction courses had been launched to general public universities for The 1st time, instructing about venereal health conditions And exactly how they were being transmitted.
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