Menstrual Myths
Claim-checking guide

Before you believe a cup claim, label what kind of claim it is.

A claim about menstrual cups may be a product measurement, a care instruction, a personal preference, a general period fact, or a health question. Those categories should not be blended together.

Step 1Ask: is this measurable, instructional, personal, or medical?
Step 2Find the source and its limits.
Step 3Do not turn “can” into “will”.
  • Find the source type.
    MonthlyCup can document its own model measurements and instructions. The NHS can provide general public health information. Neither should be stretched beyond what it says.
  • Check for exact wording.
    For example, “cups collect menstrual flow” is different from a promise about how a specific person will experience a product.
  • Look for numbers when numbers matter.
    MonthlyCup lists Mini, Normal, and Plus measurements and capacities in its guide. A vague “small”, “regular”, or “large” claim is less useful than dimensions.
  • Watch for universal size rules.
    MonthlyCup advises comparing measurements, individual flow, and preferences; age or childbirth alone are not a size rule and no model is guaranteed to fit everyone.
  • Separate care instructions from hacks.
    MonthlyCup instructs users to wash hands, empty according to flow and no later than 12 hours, release the seal before removal, and follow the supplied cleaning and storage instructions.
  • Escalate health red flags.
    The NHS says new bleeding between periods, after sex, or after menopause should be discussed with a doctor.

Five common claim types, translated into plain English.

The goal is not to make every claim sound scary. The goal is to know what evidence would be needed before a claim becomes useful.

Measurement

“This model has a listed capacity.”

This can be checked against the manufacturer’s published model data. MonthlyCup’s guide lists capacities measured up to the holes for its models.

Preference

“This size feels better for me.”

Personal experience can be real for the person sharing it, but it does not create a universal rule for another body.

Instruction

“Remove it by pulling the stem.”

MonthlyCup’s documented instruction is to release the seal before removal instead of pulling the stem alone.

General fact

“Cups collect flow.”

The NHS describes cups as period products that collect menstrual flow and can be washed and reused.

Unsupported leap

“This will solve leaks for everyone.”

A statement like this should be treated cautiously unless it is backed by appropriate evidence. No MonthlyCup model is documented here as guaranteed to fit everyone.

Health question

“Is this bleeding pattern normal for me?”

Cycle patterns vary, but some bleeding changes need a doctor. Product content should not answer individual diagnostic questions.

3MonthlyCup models listed in the guide: Mini, Normal, Plus.
12hLatest emptying interval stated in MonthlyCup’s instructions summary.
4NHS-listed product options in the bounded source: pads, tampons, cups, underwear.
0Invented tests, rankings, or customer quotes used on this site.
Next source

Read the current MonthlyCup guide before comparing models.

The guide contains the documented model measurements and basic use guidance. Treat it as manufacturer information, not independent clinical proof.