I wanted to get one. My Dr said she would want me to go off of my BC pills though until my period went back to its' normal schedule to make sure I didn't have the same kind of severe cramps that I used to have before pregnancy. The kind of IUD with hormones in it can be used to help calm down the cramps. The regular kind can make your cramps worse which in my case prior to pregnancy would have been a VERY bad situation. For now I'm not going to bother. I may someday go to it though.
The IUD prevents fertilization of the egg by producing a sterile inflammatory response that kills sperm. Some IUDs release progesterone, which prevents fertilization by affecting how the sperm or egg move. The hormone also makes the mucus in the cervix thick and sticky, so sperm can't get through to the uterus. Progesterone IUDs may also prevent implantation. The copper in the most commonly used IUD, the Copper T 380-A, seems to increase the number of white blood cells in the uterus and cause other changes that kill sperm.
WebMD
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