No technology, just doctrine.<p>There was a bad IUD with a design flaw back in the 70s called Dalkon Shield which injured and killed many women and lead to many lawsuits and settlements. Dalkon Shield gave IUDs a bad rap in the United States and lead to a cultural idea that IUDs in general were risky.<p>Now that IUDs are finally being accepted as a method of birth control for young and nulliparous women and teens there are new ones coming out designed specifically for them. Which is great, both from an individual and public health perspective.