 [ Symptoms ] when can i use an iud [ Disease ] i only recommend iuds to girls who are monogamous who have had their family and are at the point where they do not ever want to conceive again or they do not care to have another pregnancy and then an iud may be another option for them is an iud something that could cause you to become infertile it seems that the iud is a form of birth control that if you are not monogamous and you go out and have another partner the bacteria is different and so there is a string with the iud that allows for bacteria to go up into your uterus and out the fallopian tubes and cause a possibility of pelvic inflammatory disease and infertility so i would not put it into a young girl who has not had their family and i would put it into someone who is at the point where they have had their kids and they say they are done and it is a great form of birth control they do not have to think about and like i said the new mirena iud can even make their periods lighter and most women are thrilled they do not want heavier periods they want lighter periods