長期吃避孕藥會怎樣

避孕方法大全科普

避孕(Contraception)是应用科学手段使妇女暂时不受孕。 主要控制生殖过程中的三个环节:1.抑制精子与卵子产生;2.阻止精子与卵子结合;3.使子宫环境不利于精子获能、生存,或者不适宜受精卵着床和发育。免費玩避孕方法大全科普 APP玩免費免費玩避孕方法大全科普 App避孕方法大全科普 APP...

iDogtag

Design your own personalized military style dogtag!Have you ever lost your iPhone and the person who found it didn't know how to contact you? With the...

Episoder

With Episoder you can keep track of all of your favorite TV-Shows. See when the next episode is scheduled and read episode summaries. Mark episodes th...