Hormonal contraceptives, including the pill, the patch, the Depo shot, and the vaginal ring all release synthetic versions of various combinations of progesterone and estrogen.

荷尔蒙避孕药，包括避孕药、避孕贴、Depo 注射剂和阴道环，都会释放各种黄体酮和雌激素组合的合成版本。

Women, by contrast, may pick from a range which includes the Pill, vaginal rings, copper intrauterine devices, hormonal intrauterine devices, contraceptive sponges, cervical caps, spermicides, diaphragms, female condoms and tubal ligation.

相比之下，女性的选择包括避孕药、阴道避孕环、铜质宫内节育器、含孕激素宫内节育器、避孕海绵、子宫帽、杀精剂、避孕膜、女用安全套和输卵管结扎术。

Scientists are also testing other methods of stopping H.I.V.: injections of cocktails of antibodies that can block it, injections of long-lasting H.I.V. drugs, and implants and vaginal rings that release small amounts of preventive drugs over time.

科学家们还在测试其他阻止 HIV 的方法：注射可以阻断它的抗体混合物，注射长效 HIV。随着时间的推移会释放少量预防药物的药物、植入物和阴道环。