There was recently an article in Newsweek about women getting IUDs. It used to be that women who hadn't had children yet were not allowed to get them for fear of sterilization. There is also the problem that if one gets an STI, the IUD can get caught in the scar tissue, hence leading to sterilization or other health problems.
However, more research has led to IUDs being offered to more women these days. While there are two different kinds of IUDs--copper or hormonal, it can actually be a really good alternative for women who do not wish to use a hormonal form but want protection from unwanted pregnancies.
Here's an interesting article about IUD accessibility.