An intrauterine device (IUD) sits inside the uterus to prevent pregnancy, with small strings that extend through the cervix. A menstrual cup, on the other hand, is inserted into the vaginal canal to collect menstrual flow. While they technically occupy different spaces, the key is ensuring your cup doesn’t interfere with your IUD strings.
A quick search of “menstrual cups and IUDs” might have you spiralling down a rabbit hole of horror stories—tales of IUDs being expelled during cup removal, leading some people to switch to menstrual discs to avoid suction altogether.
The fear is understandable, but how much truth is there to it?
Let’s break it down.
IUD expulsion can happen for various reasons, and while menstrual cups often get the blame, studies suggest that most IUD expulsions occur naturally within the first few months after insertion — regardless of cup use.
A 2022 study found that the risk of IUD expulsion among menstrual cup users was around 3.6% compared to 2.6% in non-users [1]. That’s a slight increase, but not the dramatic risk some fear. Some case studies even suggest that menstrual cup suction isn’t strong enough to dislodge an IUD on its own.
That said, many people turn to menstrual discs as an alternative because they sit differently in the body and don’t create any suction at all.
But here’s the thing—Coralcone menstrual cups are designed differently, too!
Unlike standard menstrual cups (that can sometimes act like a plunger), Coralcone menstrual cups have no suction created from the top (because of the way the rim is shaped). This means the fear of your cup sucking your IUD out by shear force is significantly reduced!
With a softer, ergonomic design, Coralcone period cups offer a secure yet gentle fit around the sides of the cup (not the top), giving you confidence that your contraception stays put.
If you’ve just had your IUD inserted, wait at least six weeks before using a menstrual cup. This allows your body to adjust and ensures your IUD is properly positioned.
After each period, gently check your IUD strings. If they suddenly feel shorter, longer or missing, consult your doctor.
You can request that your doctor trim the strings shorter before insertion, reducing the risk of accidentally catching them when removing your cup.
Whether using Coralcone menstrual cups on their own or with the detachable ribbon stem, always break the seal first by punching in a side before removing. Be mindful not to grab your IUD strings accidentally on the way out.
* Disclaimer: This article is for informational purposes only and should not be considered medical advice. Always consult your healthcare provider if you have concerns about your IUD or menstrual cup use.
[1]. https://contraceptionmedicine.biomedcentral.com/articles/10.1186/s40834-022-00203-x