Mastering The Menstrual Cup: A Complete Step-by-Step Guide To Insertion, Removal, And Care

Menstrual Cup Explained at Sergio Wear blog

To use a menstrual cup successfully, fold the sterilized cup and insert it into the vaginal canal pointing toward your tailbone, letting it pop open to create an airtight seal below the cervix. Keep the cup inserted for up to 12 consecutive hours before breaking the vacuum seal by pinching the base and gently removing it. Proper sanitization requires boiling the cup in water for 5 to 10 minutes between menstrual cycles to maintain medical-grade hygiene standards.

Pre-Insertion Preparation & Equipment Checklist

Transitioning to a menstrual cup requires understanding your unique pelvic anatomy and selecting medical-grade equipment. Before attempting your first insertion, you must determine your cervix height. This is done by inserting a clean finger into the vaginal canal to feel for a firm, round barrier resembling the tip of a nose. A short finger length indicates a low cervix, whereas a full finger length indicates a high cervix. This measurement directly dictates the length of the cup you should purchase.

Essential Equipment Checklist

Medical-Grade Menstrual Cup: A cup compliant with USP Class VI or ISO 10993 standards, constructed from 100% medical-grade liquid silicone or thermoplastic elastomer (TPE).
Water-Based Lubricant: A clean, glycerin-free, and oil-free water-based lubricant to ease insertion without degrading the silicone polymer structure.
Sanitization Pot or Steam Sterilizer: A dedicated stainless steel pot or medical-grade silicone microwavable sterilizing cup used exclusively for boiling the device.
pH-Balanced Cleanser: A fragrance-free, oil-free, liquid soap formulated specifically for menstrual cups or intimate use (maintaining a pH range of 3.8 to 4.5).
Clean Water Source: Potable water suitable for washing hands and rinsing the cup during transitions.

Prerequisite Benchmarks

Estimated Budget: $20 to $40 USD for a high-quality cup that lasts up to 10 years with proper care.
Time Commitment: 10 minutes for initial sterilization; 2 to 5 minutes per insertion/removal cycle once the learning curve is overcome.
Anatomical Baseline: Familiarity with your vaginal angle, which slopes backward toward the tailbone rather than straight upward.

Step-by-Step Menstrual Cup Insertion, Sealing, and Extraction

Step 1: Deep Sterilization and Hand Hygiene

Before the start of your menstrual cycle, you must eliminate any surface pathogens. Place your menstrual cup in a pot of boiling water, ensuring the cup floats and does not touch the hot bottom of the pot, which can melt the silicone. Boil the cup for 5 to 10 continuous minutes.

Once sterilized and cooled, wash your hands thoroughly with warm water and antibacterial, fragrance-free soap for at least 20 seconds, paying close attention to the subungual areas under your fingernails.

Warning: Never use rubbing alcohol, dish soap, hydrogen peroxide, or vinegar to clean your cup, as these harsh agents degrade the medical-grade material and disrupt the delicate vaginal microbiome.

Step 2: Selecting and Executing Your Fold

Folding reduces the insertion diameter of the cup from roughly 40-45mm to the size of a standard tampon. Experiment with these three common folds to find the one that suits your comfort:

The Punch-Down Fold (Ideal for Beginners): Place your finger on the rim of the cup and push it straight down inside the base. Squeeze the sides together. This creates a very narrow, pointed insertion tip.
The C-Fold (The Standard Fold): Pinch the cup flat, and then fold it in half horizontally to form the letter "C" or "U". This works well for those with strong pelvic floor muscles, as it pops open with significant force.
The 7-Fold (Ideal for Easy Opening): Pinch the cup flat, then fold one top corner diagonally down toward the opposite base of the cup, forming the shape of a number "7". This reduces the rim size while leaving a clean release point.

Step 3: Angled Insertion and Correct Positioning

Adopt a comfortable physical posture. You may squat deeply, stand with one leg elevated on the edge of the bathtub, or sit on the toilet with knees spread wide. Relax your pelvic floor muscles (the pubococcygeus muscle group).

Apply a small, dime-sized drop of water-based lubricant to the rim of the folded cup. Hold the folded cup firmly between your thumb and forefinger. Part your labia with your opposite hand.

Guide the folded cup into your vagina at a 45-degree angle pointing toward your lower back/tailbone, rather than straight up. Slide the cup in until the entire body of the cup is inside the vaginal canal, leaving only the stem accessible. The base of the cup should sit approximately 1 to 2 centimeters above the vaginal opening, well below a standard tampon's resting position.

Pro-Tip: If the cup feels dry or resists sliding inward, run it under cool water immediately before insertion. The water acts as a natural lubricant and tempers the silicone, making it slightly firmer and easier to position.

Step 4: Activating the Hermetic Vacuum Seal

Once the cup is in position, release your grip to allow the cup to spring open. To ensure it has opened fully and formed a secure, leak-proof vacuum seal:

Slide your index finger along the base of the cup. It should feel completely round and smooth, without any flat spots, creases, or indentations.
If you detect an indentation, grip the base of the cup (not the stem) and rotate it a full 360 degrees. This rotation forces air inside, prompting the rim to pop open.
Gently tug on the stem. If you feel resistance and the cup resists downward movement, the vacuum seal is locked. If it slides down easily, the seal has not formed, and you must re-verify the positioning.

Step 5: Controlled Extraction and Emptying

Leave the cup in place for a maximum of 12 hours. If you have a heavy flow, empty it every 4 to 8 hours. To remove the cup safely:

Wash your hands thoroughly with clean water and soap.
Assume a squatting position to naturally shorten your vaginal canal, pushing the cup downward using your abdominal muscles (similar to a gentle bowel movement).
Locate the stem to guide your fingers to the ribbed base of the cup.
Do not pull the cup out by the stem alone. Pulling the stem without breaking the seal creates a painful suction effect on your cervix.
Firmly pinch the base of the cup between your thumb and index finger. This physical pinch releases the vacuum seal.
Maintain a firm grip on the base, keeping the cup upright to prevent spillage, and gently walk it side to side as you pull it out of the vaginal opening.
Empty the contents directly into the toilet. Rinse the cup with cold water first (to prevent staining and odor build-up), then wash it with warm water and your pH-neutral cleanser before re-inserting.

Uses Of Menstrual Cup at Gregory Boudreau blog

Material Specifications and Sizing Metrics

Choosing the correct cup configuration depends on your biological history, pelvic floor strength, and anatomical dimensions. Use the technical parameters below to select your optimal device.

Metric / Parameter	Size Small / Mini (Active)	Size Medium / Large (Standard)	Low-Cervix / Short Cup	High-Stem / Long Cup
Material Composition	Medical-grade Silicone / TPE	Medical-grade Silicone / TPE	Soft Medical-grade TPE	Firm Medical-grade Silicone
Rim Diameter	38 mm to 41 mm	42 mm to 46 mm	40 mm to 45 mm	40 mm to 43 mm
Overall Length	45 mm to 50 mm (excl. stem)	50 mm to 57 mm (excl. stem)	35 mm to 40 mm	55 mm to 60 mm
Liquid Capacity	15 ml to 25 ml	28 ml to 38 ml	15 ml to 20 ml	30 ml to 40 ml
Durometer (Firmness)	Medium (Soft-to-Mid range)	Medium-Firm to Firm	Ultra-Soft to Soft	Mid-to-High Firmness
Primary Demographics	Under 30; no vaginal births	Over 30; or post-vaginal birth	Low cervix height (<4 cm)	High cervix height (>7 cm)
Pelvic Floor Match	Standard/Strong muscles	Standard/Weakened muscles	Highly sensitive/low cervix	High-tone pelvic floor athletes

Resolving Common Menstrual Cup Obstacles & Failures

Scenario 1: Persistent Leaking or Spotting

Root Cause: The cup has either failed to pop open fully, or it has been inserted past the cervix, allowing menstrual fluid to bypass the cup completely. High pelvic tension can also squeeze softer cups, breaking the seal during physical movement.
Actionable Fix: Insert your finger and locate the position of your cervix. It should sit directly inside the cup's rim. If your cervix is sitting outside the cup, pull the cup down, re-fold, and re-insert, angling the cup slightly downward toward your lower back. If the cup is collapsing from muscle activity, switch to a cup with a higher durometer (firmer rim).

Scenario 2: The Cup Migrates Upward and Cannot Be Reached

Root Cause: The cup has settled high in the vaginal canal near a deep vaginal fornix, often caused by a naturally high cervix, strong pelvic floor contractions, or sleeping.
Actionable Fix: Do not panic; the cup cannot get lost inside your body, as the cervix forms a physical barrier. Sit on the toilet, relax your body, and perform a series of gentle downward bearing-down pulses using your pelvic muscles. This action pushes the cup down. Reach up with your thumb and index finger, locate the stem, and walk your fingers up to pinch the base of the cup to release the suction before extraction.

Scenario 3: Bladder Pressure, Slowed Urine Flow, or Cramping

Root Cause: The menstrual cup is either too firm, too large, or positioned incorrectly, causing the rim to press directly against your urethra or bladder neck through the vaginal wall.
Actionable Fix: Reposition the cup slightly lower in the vaginal canal so it sits below the sensitive pubic bone area. If the pressure continues to restrict your urinary stream or intensifies cramping, switch to a cup made of a softer, more pliable durometer silicone, or select a smaller diameter cup.

Scenario 4: The Silicone Has Developed a Strong Odor or Discoloration

Root Cause: The cup has been left in for longer than the recommended 12-hour limit, washed in hot water before cold rinsing (which sets proteins and stains), or stored in an airtight container where bacteria thrive.
Actionable Fix: Soak the cup in a 3% hydrogen peroxide solution for up to 12 hours to lift stains and neutralize odors. Rinse thoroughly and boil the cup for 10 minutes. Always store your cup in a breathable cotton pouch, never in plastic bags or airtight containers.

Frequently Asked Questions

Can you use a menstrual cup with an IUD (Intrauterine Device)?

Yes, you can safely use a menstrual cup with an IUD, but you must exercise caution during extraction. Always pinch the base of the cup to fully break the vacuum seal before pulling it downward, ensuring the suction does not pull on the IUD strings. Additionally, have your gynecologist trim your IUD strings short so they do not hang low enough to get caught between the cup wall and your vaginal tissue.

How often do you need to clean and empty a menstrual cup?

A menstrual cup must be emptied, rinsed, and re-inserted at least once every 12 hours, even if your flow is very light, to mitigate the risk of Toxic Shock Syndrome (TSS). On heavier flow days, you may need to empty and clean your cup every 4 to 8 hours to prevent overflow leaks.

Can you sleep with a menstrual cup inside?

Yes, you can safely wear a menstrual cup while sleeping, provided you do not exceed the 12-hour wear limit. Simply empty and rinse the cup immediately before going to bed, and clean it as soon as you wake up in the morning.

What should you do if your menstrual cup smells?

If your cup develops an odor, it is likely due to lingering proteins or storing it in a non-breathable container. Boil the cup in water for 10 minutes to eliminate bacteria, or soak it in a 3% hydrogen peroxide solution for up to 12 hours, followed by a thorough wash with pH-neutral soap and clean water.

How do you know if your cervix is high or low?

To measure your cervix height, insert a clean index finger into your vagina during your period, as the cervix shifts lower during menstruation. If you can touch your cervix (which feels like a firm, round button with a small indentation) at or before your first knuckle, your cervix is low; if it is at your second knuckle, it is medium; if you cannot reach it or only reach it at your third knuckle, you have a high cervix.

Transition to Sustainable and Worry-Free Period Care

Embracing the structural freedom and environmental benefits of a menstrual cup is one of the most empowering health choices you can make. Take the time to understand your body, practice your folding technique, and experience a level of comfort that lasts all day long.