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避孕方法是如何起作用的

避孕方法透過防止受孕來實現避孕。有些方法可阻止卵子成熟。有些方法可阻止精子和卵子接觸。有些方法則二者兼備。

防止排卵

某些荷爾蒙幫助阻止卵子成熟和排放。荷爾蒙方法包括:

  • 避孕藥

  • 皮膚貼片

  • 陰道避孕環

  • 注射

阻止精子和卵子接觸

阻止精子和卵子結合的方法包括:

  • 屏障方法，譬如安全套、子宮帽和宮頸帽

  • 殺精劑

  • IUD（宮內節育器）

  • 殺精劑

  • 自然計劃生育

  • 一些類型的荷爾蒙方法

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