Cervix Position: How To Measure Your Cervix

A cervix is the narrow passage that links the uterus and the vagina. The uterus is where the lining becomes thicker, while preparing for a fertilized egg. If the egg doesn’t get fertilised (there is no sperm, and therefore, no pregnancy), then that lining comes off, and flows through the cervix, and then the vagina. This is your monthly period flow!

Cervix Position: How To Measure Your Cervix

Knowing the position of your cervix, can help monitor ovulation, and is especially helpful for those who are thinking of using a menstrual cup for the first time. Knowing your cervical position will help determine which brand, or size of cup you should use, and whether you will need to trim the stem of your cup for comfort.

When Should You Check Your Cervix Position?

Cervix positions can change during a woman’s cycle, so the best time to check your positioning would be during your period. 

  • You should check it several times over several days, at roughly the same time each day.
  • Do not check your cervix position before, during or straight after intercourse or sexual arousal as this may cause the cervix to change positions. The vaginal canal can also length and widen during this time. 
  • If you currently have a yeast infection or any other kind of vagina infection, you should wait until it is completely cleared up before checking your cervix position.
  • Do not check your cervix while lying down as this will not be accurate. Let gravity do its thing!

How Do You Check Your Cervix Position?

Make sure your hands are clean before attempting to check your cervical position. You may also need to cut your nails to ensure you don’t accidentally scratch yourself!

Find a comfortable position that will make it easier for you to reach inside and find your cervix. You can either squat or lift one leg up onto the toilet seat or the edge of a bathtub. You might want to do this even during your shower, when you are most relaxed.

Put your fore or middle finger into your vagina, and try to reach the end of it. The vagina will be soft and squishy, that you can pass through, and the cervix will be where your finger stops. The cervix may feel like the end of your nose, soft but firm and rigid. The shape of it is like a small doughnut!

Take note of how far your finger is inside the vagina. Use the ‘Knuckle Rule.’

The female reproductive organ

The "Knuckle Rule"

Low Cervix

See Best Menstrual Cup for Low Cervix

If you can feel your cervix and your finger only goes in at your 1st knuckle or where you finger bends at the top, then you have a Low Cervix

Medium Cervix

If you can feel your cervix and your finger goes in further to reach the 2nd knuckle or about halfway of your finger then you have a Medium Cervix


High Cervix

See Best Menstrual Cup for High Cervix

If you can barely reach your cervix and most of your finger is inside your vagina, then you have a High Cervix

Of course, everyone’s hands, fingers, and knuckles may differ in length and size, so take this ‘rule’ with a grain of salt. If you want to be more precise, you can use your finger to determine where your cervix sits, and use a measuring tape to properly see the length of your vaginal canal.

Why Is This Important When Choosing a Menstrual Cup?

Knowing the rough position of your cervix will help determine which menstrual cup to purchase. They come in a range of sizes, shapes and diameters, and the choice can be overwhelming, especially for a first time user.

Menstrual cups are also an initial monetary investment (which will give you a great return in the future!), so you should consider your cervical position before you choose your correct cup. If a cup is too long, then you may be uncomfortable, or the base or stem may be sticking out. If the cup is too short, then it may make removal of the cup very difficult.

Now that you know how to determine your cervix position, you can compare different menstrual cups to figure out whether it will ‘fit’ or not. Remember to also look at the length of the actual cup, not just the overall length, as many stems are designed so that the user may trim or cut it down or completely off.

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