迄今,世界上的避孕药具最可靠的只有两种:一种是女用口服避孕药;另一种是男用避孕套。然而,前者由于药物中使用了激素,有人担心副作用;后者在夫妻中愿意坚持长期使用的也不多。听以,研究人员总在不断地寻找新的避孕方法。 去年底,英国推出一种被誉为划时代的避孕工具,它取名为“角色”(Persona)。这种避孕具完全采 To date, only two of the most reliable contraceptives in the world are available: one for women with oral contraceptives and the other for male condoms. However, the former is concerned about the side effects due to the use of hormones in the drug, and the latter is willing to insist on long-term use among couples. Listen to, researchers are always looking for new methods of contraception. Late last year, the United Kingdom introduced a landmark contraceptive known as “Persona.” This contraceptive completely collected