Sex & Romance
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I'm considering getting an IUD. From what I've read on the board and in other places, the biggest drawback about them seems to be a heavier flow.
My questions deal with sex - do you need to take extra physical precautions when having sex, i.e. not being too rough/not having him go in all the way? Would he be able to feel it? I'm just wondering if the IUD can become dislodged or moved around and could possibly hurt me.
I'm completely uninformed about this, so you'll have to excuse the bluntness and possible naivety. Thanks! 
Re: Sex with an IUD
The Copper IUD increases flow, the hormonal IUD (Mirena) tends to greatly lighten/eliminate your period altogether. You'll want to do research on the more specific differences to figure out the right one for you.
I've had the Mirena IUD for almost a year and no problems with sex thus far. It's inserted into your cervix, not just floating around in your vagina, so it should never come in contact with your partner's penis. Some men complain about feeling the strings during sex, but that can be easily fixed by trimming them or just letting them kind of curl up against the wall of your vagina.
Be careful with your research - there are a lot of horror stories out there, but that is mostly representative of a few rare cases - few people dedicate web pages to medical procedures that go smoothly!
I had the copper IUD for 3.5 years. It really didn't affect sex directly. My FI couldn't feel the strings and neither could I.
It did affect sex indirectly. Hope this isn't TMI, but I never had a problem with sex during my period until I got the IUD, when I couldn't tolerate it. Since my periods were much longer with the IUD, it meant that over the course of a month, there were significantly fewer days when I could have sex. So in that way I guess it did affect me.
Good luck finding the best BC for you... I'm still looking!
Ditto.
Well, you can't see it and you really can't even feel it - it just sticks out of your cervix Also, it's like fishing line - it's not like a cotton tampon string that would absorb bacteria. It probably just cleans off just like everything else up there does.
Thanks Chrissykaren -- I didn't really want to mention roughness, but yes, it was something I was interested in. That was helpful.
Also, it's estrogen that knocks most forms of BC out for me, as it interferes with another medication I'm on. So does that mean Mirena is estrogen-free?
Rough sex and kinkier forms of sex are fine with an IUD. I've had my copper IUD for 10 years, getting it replaced this year. For me the cramps are insanely painful and the flow is heavier. I'm considering hormone based for my next IUD.
My FI is responsible for checking on the IUD as a form of foreplay... he's there anyway. He makes sure the string is the same length each time (so that it proves it's not moved).