An intrauterine device (IUD) is a small, T-shaped object inserted into the uterus by a healthcare provider to prevent pregnancy. It works by creating an environment that is not suitable for sperm or by releasing hormones to stop ovulation, which is the release of an egg from the ovary. IUDs are highly effective, long-lasting, and can remain in place for several years. There are two main types: hormonal IUDs, which release hormones to prevent pregnancy, and copper IUDs, which use copper to create an environment that is not suitable for sperm.

英語での「intrauterine device」の定義と意味

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