I have an IUD as well and do have to bear down to remove the Diva Cup. I have never had a problem. My personal feeling on this is that as long as you can break the suction and are careful not to be grabbing the strings the IUD should not come out. Most people have to bear down when having a BM and if that was a real big problem women would be popping IUDs out right and left.
I started using my cup immediately after insertion of the IUD and it was fine but you may want to give it a cycle or two to make sure your body isn't rejecting the IUD. I think that most expulsions are related to the body rejecting the thing than anything else.

"Most people have to bear down when having a BM and if that was a real big problem women would be popping IUDs out right and left."

This is what I was going to say!

Thank you!

Your cervix is the "door" to your uterus where your IUD is situated. You do not bear down with your cervix so no... bearing down will not affect it.

The risk of expulsion is highest in the first few months that you have your IUD. Your doctor will probably tell you to use pads for your first cycle after it. Then follow his advice. Also, bring your cup with you (because he's probably not familiar with cups) so that he can see how short to trim your strings.

Thank you! And believe it or not, my gyno is very encouraging of both the IUD and the menstrual cup! So I think I am in good shape!

Thanks!

My gyno was the same way-she rocks!!

I'd go against what others day in that the need to bear down could be a problem, the mechanics of bearing down (such as when having a BM) itself would not cause the IUT to expell normally, however if the cup rim catches the strings of the IUD then you bearing down to move the cup further down in your vagina could cause the cup to pull the strings down with it.

You say the Divacup sits quite high for you, but if you're basing that on your need to bear down to grab the cup then that may not mean that the cup actually sits high enough to your cervix to cause problems. My experience was that with the Mooncup I had no problems, but on switching to the Ladycup I had two IUD's pulled down (not out), this was because my cervix sits low and far back during the first few days of my cycle and the Ladycup sits very high so it keeps catching the strings - I had a feeling this had happened, but I couldn't feel the base of my IUD so was not sure until two ultrasounds (after abdominal pains - we assume the moved IUD was the cause) confirmed they had moved down. My experience is rare, and the result of my diva of a vagina and the Ladycup.

My advice - Divacup say their cup is fine for use with IUD's and it's rare for cups to cause IUD's to expell, so don't worry about it until you have to!! See how the Divacup works with your IUD, switch to a different cup if you need to. As has been said avoiding using it when you first get your IUD inserted, once you do use the cup again be careful on removal - if you can try to see where your cervix and the strings of the IUD sit so you can adjust how you remove the cup if needed. If the cup pulls the IUD it can be a very subtle sensation in your cervix, it may also be accompanied with light cramping or stabbing pains - be aware of this and rather than just check the strings make sure that the bottom of the IUD cannot be felt through the bottom of your cervix.

Thank you for your advice! I actually never thought about "where" my cup actually sits in my cervix until I began reading all of these posts with respect to the IUD. Because I have not had any problems and am very comfortable with my menstrual cup, I am not going to worry too much about it.

Thanks!

Actually, Diva recommends you not use their cup with an IUD:
"Q. Can The DivaCup be worn with an IUD?
A. The DivaCup is not suggested for use with an Intrauterine Device (IUD). It is possible for the IUD to become dislodged, displaced or removed when the menstrual cup is removed by inadvertently pulling on the IUD string. As with all gynecological concerns, please consult with your physician."

But, the Diva company has been making quite a name for itself by covering their butts at the expense of their customers, by changing their recommendation that the cup lasts 10 years to a recommendation that it be replaced annually and by discouraging cleaning methods that do not use DivaWash, among other somewhat sketchy things, so, as always, make the decision for yourself.

I couldn't comfortably use my Ladycup for the same reason- as well as my Femmecup. I have been using my Lunette without any problems as it's easier to break the seal and it doesn't suction to my cervix as the other 2. I also started using my cup immediately upon suggestion of my Doc.