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Emergency contraception Ulipristal acetate Yuzpe regimen Levonorgestrel. At least 26 different chemical combinations have been attempted to achieve sterilization. Views Read Edit View history. There are two types of vas-occlusive plugs : injectable plugs and non-injectable plugs. International Journal of Andrology. Insertion of an Intravasal Thread IVT , also known as an Intravasal Device IVD , in the vas deferens has been shown to inhibit sperm transport via mechanical obstruction and the removal of the IVT results in restored vas deferens patency. By using this site, you agree to the Terms of Use and Privacy Policy.

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