Do Menstrual Cups Affect Hormones? Evidence and Common Myths

Short answer: a menstrual cup does not alter hormone levels, regulate the menstrual cycle or treat premenstrual syndrome (PMS). It is a period product that collects menstrual flow. Choosing a cup may make period care more convenient for some people, but convenience is not a hormonal or medical effect.

What controls the menstrual cycle?

The menstrual cycle is coordinated by hormones produced by the brain and ovaries. These signals influence ovulation and changes in the uterine lining. A cup sits in the vagina and collects menstrual fluid after it leaves the uterus; it does not deliver hormones and does not act on the ovaries, brain or uterine lining. The World Health Organization’s menstrual-health overview describes the cycle as hormone-regulated and stresses access to accurate information, suitable menstrual materials and timely care for menstrual difficulties.

What Elys Cup does

Elys Cup is a reusable menstrual cup made from medical-grade silicone. It is designed to collect flow and for removal without a suction effect. It can be worn for up to 8 hours, but it should be emptied sooner according to your flow and the product instructions. It does not contain or release hormones, and its intended role is period management—not treatment.

A 2019 systematic review and meta-analysis of menstrual-cup use examined leakage, acceptability and reported safety outcomes. The review found that learning to use a cup often took several cycles and also noted that higher-quality research was needed. It did not establish that cups balance hormones, treat PMS or change the menstrual cycle.

Common myths

“A cup naturally balances hormones”

No plausible product mechanism or clinical evidence shows that collecting menstrual flow changes oestrogen, progesterone or other cycle hormones. “Hormone-free” can accurately describe the fact that a cup does not deliver hormones; it must not be turned into the claim that the cup corrects hormonal imbalance.

“A cup reduces PMS or cramps”

PMS can include physical and emotional symptoms before menstruation. A person may prefer how one product feels, and fewer product changes may simplify a routine, but those experiences do not demonstrate treatment of PMS. Pain, heavy bleeding, mood changes or other symptoms can have many causes. Product choice should not delay assessment when symptoms disrupt daily life.

“A cup reduces stress, improves sleep or boosts performance”

A predictable routine may reduce practical worry for some users. Others may find insertion, removal or cleaning stressful, especially while learning. A cup does not treat anxiety, improve sleep, enhance athletic performance or speed recovery. Those are health outcomes that require their own evidence and, when persistent, appropriate professional support.

Why symptoms may change from one cycle to another

Symptoms can vary with age, life stage, contraception, pregnancy and postpartum changes, health conditions, stress, sleep and other factors. A change that happens after switching period products is not automatically caused by that product. Keep a simple symptom record if it helps you describe patterns, but do not use an app or cup to diagnose the cause.

When to seek medical advice

Talk with a qualified healthcare professional if pain is severe or worsening, bleeding is very heavy or unusual for you, symptoms regularly prevent normal activities, cycles change markedly, or mood symptoms are distressing. The WHO notes that concerning pain, heavy bleeding and mood changes deserve timely evaluation. Seek urgent care for severe symptoms or if you feel acutely unwell.

Safe-use basics

• Read the instructions before first use and practise insertion and removal without rushing.
• Wash your hands before handling the cup and clean it as directed.
• Wear Elys Cup for no more than 8 hours and empty it earlier when your flow requires.
• Remove the cup if it causes pain or persistent pressure; seek advice if symptoms continue.
• Ask a clinician for individual guidance if you have a medical condition, recent pelvic procedure or questions about using a cup with an intrauterine device.

For practical help, read the insertion guide, the cleaning guide and the Elys Cup FAQ.

Sources

• World Health Organization: Menstrual health (reviewed 27 August 2026).
• van Eijk et al. Menstrual cup use, leakage, acceptability, safety, and availability: a systematic review and meta-analysis, Lancet Public Health, 2019 (PMID 31324419).

This article provides general information and does not replace medical advice, diagnosis or treatment.