If you're one of the nearly six percent of American women on contraception who use the IUD (intrauterine device) Mirena or ParaGard, you might be wondering how can you get pregnant, and how soon can you get pregnant, after having the IUD removed. "As soon as the device is taken out by your doctor, you could become pregnant," says Hilda Hutcherson, M.D., clinical professor of obstetrics and gynecology at Columbia University Medical Center, in New York City. Both Mirena and ParaGard work locally in the uterus to prevent sperm from swimming. ParaGard is made of a copper that creates a toxic environment for sperm in the uterus, and Mirena releases small and steady amounts of progestin that thickens the cervical mucous and thins the uterine lining. With ParaGard, because no hormones are involved, your body doesn't have to readjust -- once the ParaGard is out, sperm can swim normally again. With Mirena, the dose of progestin is so low and doesn't get absorbed into your system (like it does with the Pill or with the Depo shot), that it doesn't interfere with ovulation; once the Mirena IUD is out, you're good to go. If you don't get pregnant right away, don't panic -- it's not uncommon for women to try for several months, or even for a full year, even if they've never used an IUD. The good news is that studies show that eight out of ten women become pregnant within a year after having Mirena removed, and 43 percent of women become pregnant within three months of having ParaGard removed.