| http://www.w3.org/ns/prov#value | - A number of methods are available to effect either permanent sterility (e.g. sectioning and ligation of the Fallopian tubes or the vas deferens) or reversible sterility (e.g. hormonal contraceptives, such as the birth control pill, intrauterine devices, the cervical diaphragm or vaginal creams, foams and suppositories).
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