Intrauterine devices, "Dalkon shield", plastic, 1 of 2, 1970-1981

An intrauterine device is known as an IUD. It is a contraceptive worn inside the uterus, potentially for up to five years. It is the most inexpensive long-term reversible method of contraception available. An IUD works after conception. It stops a newly fertilised embryo implanting and growing in the lining of the uterus. IUDs became popular in the 1960s and 1970s. However, scares and litigation in the 1980s made them less popular. The ‘Dalkon shield’ IUD caused internal injuries to many users. They sued maker A. H. Robins Company for damages.