If you've tried multiple times and tested different sizes, but your disc keeps leaking or won’t stay in place, it might just not be the right fit for your anatomy.
Here are 3 anatomical reasons why a menstrual disc might not work for you:
- 🔄 Your cervix is tilted toward your back and pressed against your vaginal wall.
- 🦴 You have a flat pubic bone.
- 📉 You’re experiencing pelvic organ prolapse.
If none of these apply to you, the disc should work just fine! In that case, check out our full article on troubleshooting menstrual disc leaks or reach out to our friendly customer support team, we're happy to help. 💬
1. Cervix Tilted Back and Pressed Against the Vaginal Wall
If your cervix is tilted toward your back and pressed up against your vaginal wall, using a menstrual disc might be more difficult. This position can make it harder to tuck the disc properly under the cervix, which means it may not collect your flow correctly, leading to leaks. 🩸
To check if your cervix is tilted backward, you can insert a clean finger into your vagina and try to feel for your cervix, it feels like a small bump with a tiny opening. Try to notice where it’s positioned in relation to the walls of your vagina. 🖐️
👉 For more details, check out our full article on using a menstrual disc with a retroverted uterus. We share helpful tips and positioning tricks.
2. Flat or Shallow Pubic Bone
This is pretty rare. In most cases where a menstrual disc keeps slipping, it’s usually due to sizing issues (too big or too small).
However, if you’ve already tried multiple sizes and your disc still doesn’t stay in place, it might be worth checking the shape of your pubic bone.
Why Does Pubic Bone Shape Matter for Menstrual Discs?
Your pubic bone helps keep the disc in place. The back of the disc rests in the fornix (the upper part of the vaginal canal), while the front part tucks just behind your pubic bone (also called the pubic symphysis). 🦴
If your pubic bone is too flat, the disc may not "catch" properly and could slide forward causing leaks and making the disc less effective. 🚫
How to Tell If You Have a Flat or Curved Pubic Bone
You can try feeling it with your finger:
- Insert a clean finger into your vagina.
- Push against the front wall of your vaginal canal. That firm surface is your pubic bone.
- Move your finger up and down to feel its shape.
- If it feels deeply curved like a small "scoop" or ridge, that’s a good sign. The disc will likely nestle in and stay put.
- If it feels flat, the disc may have a harder time staying in place.
You could try a firmer disc that’s less likely to shift but results may vary, and discs might still be tricky to use in this case.
3. Using a Menstrual Disc with Pelvic Organ Prolapse
What is a prolapse and what causes it?
Pelvic organ prolapse happens when organs like the bladder, uterus, or urethra shift downward from their normal position.
This occurs when the pelvic floor muscles, responsible for holding everything in place, become weakened. 💪
It’s most commonly seen after vaginal childbirth.
But other factors like heavy lifting, menopause, or obesity can also lead to prolapse.
Why a prolapse makes menstrual disc use more difficult
Even though menstrual discs are generally a better option than cups for people with a low cervix, a prolapse can make proper placement tricky.
If your cervix has dropped too low due to prolapse, it may be difficult for the disc to stay tucked behind the pubic bone, meaning it won’t stay in place.
According to health experts in our recent study, internal period products like menstrual discs, cups, and tampons are not recommended in cases of prolapse. Mainly to avoid infections or added pressure on weakened areas.
What You Can Do Instead
Don’t worry, these situations are rare. In most cases, if your disc leaks or won’t stay in place, it’s either a sizing issue or a positioning mistake.
✅ We recommend trying your disc a few more times to make sure it’s inserted correctly. (Read our guide to using your menstrual disc the right way).
✅ You can also try different sizes to find your perfect match. Check out our comparison of menstrual disc sizes by brand.
At Cup&Co, we’ve created a beginner-friendly set that includes two reusable discs in two sizes (S + L) with a 90-day guarantee, so you can test both and see which fits best. 😍
👉 Try 2 Menstrual Discs for the Price of 1 – Risk-Free for 90 Days!
However, if you fall into the first or second category, we recommend trying a menstrual cup instead.
Other common questions
What type of period protection is best with a prolapse?
If you're experiencing pelvic organ prolapse, most healthcare providers recommend using external period products to avoid irritation or infection. That includes period underwear or pads, which don’t require internal insertion and are more comfortable and practical. 🩹
How do I know if my menstrual disc is placed correctly?
To check if your menstrual disc is properly positioned, follow these simple steps:
- Insert a clean finger and make sure the disc is tucked just below your cervix.
- Confirm the back rim is nestled behind your cervix.
- Ensure the front rim is resting behind your pubic bone and both sides are sealed against the vaginal walls.
If everything feels snug and secure, you’re good to go!
Can I use a menstrual disc after giving birth?
Absolutely! A menstrual disc can be a great option postpartum, especially if your period has become heavier and your old cup no longer fits as well.
Many moms switch to discs because they’re more comfortable and better suited to their changing anatomy. 🤱
👉 Read what moms are saying about menstrual discs
Are menstrual discs safe for teens?
Yes, menstrual discs are safe for anyone who menstruates.
However, we recommend being comfortable with your body before using one, which isn’t always the case for younger users. If you’re new to internal protection, starting with a tampon might help you ease into it before trying a disc.
