Using a menstrual cup promises "zero sensation". But to achieve that, it needs to be parked in exactly the right spot.
Too high? It may leak. Too low? It causes discomfort. Unlike a tampon that you push all the way in, the cup has a very specific comfort zone. Here is the anatomical guide to finding your "sweet spot" so you never feel it again.
Table of contents
1- The Golden Rule: Forget the tampon reflex
This is the most classic beginner mistake. We're used to pushing tampons as far in as possible, until they reach the cervix.
With a cup, it's the opposite.
The cup sits low, right at the entrance of the vagina.
- The reference point: The base of the cup (the Moonpad) should sit approximately one knuckle (your first finger joint) from the vulval opening.
- The test: If you squeeze your muscles, you should be able to feel the base. If you can't feel it at all with your finger, it has probably travelled too high.
2- The Fornix trap (Why too high = leaks)
Why shouldn't you push it all the way in? Because of anatomy.
The vagina doesn't end abruptly at the cervix. It forms small "recesses" around the cervix known as the fornices.
🚨 The worst-case scenario:
If you push the cup too high, the cervix can slip to one side, ending up outside the cup. The cup lodges in the fornix (beside the cervix).
Result: Blood flows alongside the cup and straight into your underwear, while the cup remains empty. This is the number one cause of "mystery
leaks".
3- The comfort zone (The stability triangle)
Your anatomy is well designed. There is a natural support zone.
The ideal position is where the base of the cup rests on a muscular triangle formed by:
- The pubic bone at the front.
- The levator ani muscles (pelvic floor) on the sides and back.
In this zone (relatively low), the cup is held in place effortlessly. If it moves up slightly during the day, that's normal — your vagina is dynamic! As long as it stays below the cervix, everything is fine.
4- The stem problem (and the Moonpad solution)
This is where the design of your cup makes all the difference.
With a stemmed cup (standard):
If you position it correctly (low), the stem often protrudes outside and rubs against the vulva. This is irritating.
The consequence: Many users push it too high to hide the stem… and end up in the fornix with leaks.
With La Cup Luneale (Moonpad):
Because there is no stem, you can leave it in its natural (low) position with zero discomfort. The Moonpad is designed to sit right at the
entrance — accessible, without causing any irritation. Absolute freedom of placement.
In short: Don't aim for the back. Aim for the entrance. If you forget it's there, it's in the right place.
