A growing number of U.S. women may be opting for intrauterine devices (IUDs) as their birth control method, a national survey finds.  That’s good news, researchers say, since IUDs and contraceptive implants are the most effective forms of reversible birth control.

In the U.S., though, they are still far from the most popular, with use lagging well behind birth control pills and condoms.   In the new study, researchers found that in 2009, 8.5 percent of U.S. women using birth control chose an IUD or implant – with the large majority going with the IUD.