ObGyn Doctor Explains about IUD as long-acting reversible contraception

An IUD is one of a group of contraceptives known as ‘long-acting reversible contraception’ (LARC).

A Japanese obstetrician-gynaecologist is talking about the following topics.
・What is an intrauterine device (IUD)?
・How does it work?
・How effective is it?
・What are the advantages of using an IUD?
・What are the disadvantages?
・Who can use an IUD?
・How is it fitted?
・How is the IUD taken out?
・Does using an IUD affect my fertility?
・Can I use tampons if I have an IUD?
・What should I do if I am using an IUD but I think I have for pregnant anyway?