can a menstrual disc be used as birth control?

Date Created: 18th of July 2025
Read Time: 5 minutes

Why menstrual discs are not contraceptives

Menstrual discs, like the my mimi reusable menstrual disc, are designed for period care, not contraception. While they sit internally, similar to a diaphragm, they do not offer the same protection against pregnancy. A menstrual disc’s primary purpose is to collect menstrual blood comfortably and securely, not to act as a barrier to sperm.

Some people mistakenly believe that a menstrual disc could prevent pregnancy simply because it covers the vaginal canal. This is not true. Unlike a diaphragm, which is designed and fitted for contraceptive use, a menstrual disc does not create a reliable seal or provide any sperm-blocking capability.

Understanding what a menstrual disc is

A menstrual disc is a reusable or disposable device that collects blood during menstruation. It sits in the vaginal fornix, just below the cervix, and can hold more liquid than a traditional tampon or cup.

The my mimi reusable menstrual disc is made from soft medical-grade silicone, designed to move with the body. It is TGA-compliant and FDA-registered, which ensures it is safe for long-term use. It’s also been recognised with the award for “Best Sustainable Period Care Solution in Australia 2025” for its focus on comfort, sustainability, and affordability.

Why menstrual discs cannot prevent pregnancy

The key reason a menstrual disc cannot be used as birth control lies in its design. It does not form a seal tight enough to block sperm from reaching the cervix. During sexual intercourse, a menstrual disc may shift slightly, leaving space for semen to pass around it.

While my mimi discs are safe to wear during sex and are known for their comfort, this is not the same as contraceptive protection. If pregnancy prevention is the goal, a condom or other medical contraceptive option must be used.

Common misconceptions about menstrual discs

1. Do menstrual discs work like diaphragms?

No. Diaphragms are medical devices specifically shaped to block sperm entry and are used with spermicides. A menstrual disc, on the other hand, is a period product designed only for blood collection.

2. Can you have sex while wearing a menstrual disc?

Yes, you can have sex while wearing a menstrual disc, as it sits high in the vaginal canal and does not rely on suction. my mimi discs are known for their soft loop tab and flexible rim, which makes them both comfortable and easy to remove. However, this feature has nothing to do with birth control.

3. Are there risks if I rely on a disc as contraception?

Yes. Using a menstrual disc as birth control is unreliable and could lead to unintended pregnancy. Always use a proven method of contraception if needed.

Comfort and design of my mimi

One of the standout features of my mimi is its design. It comes in two sizes to suit different anatomy and life stages:

• Small: 61mm diameter, 35.2mm tall, holds up to 32ml (recommended for users under 30 or those who have not given birth vaginally).
• Large: 68mm diameter, 39.2mm tall, holds up to 61ml (recommended for users over 30 or those who have given birth vaginally).

Each disc includes a flexible loop tab for easy removal, allowing for stress-free use during heavy flow days or active lifestyles. my mimi discs provide up to 12 hours of wear, replacing the need for thousands of single-use pads and tampons over five years. At roughly 83 cents per month, it is both affordable and sustainable.

Menstrual disc vs menstrual cup

A common question is how a menstrual disc compares to a menstrual cup. While both are reusable menstrual products, a menstrual disc sits higher in the vaginal canal and does not rely on suction, making it more comfortable for some users. It can also be worn during penetrative sex, unlike most menstrual cups.

Final thoughts

A menstrual disc is not birth control. It is designed solely for period care, providing comfort, sustainability, and longer wear time than many other products. If you are considering contraception, speak with a healthcare provider about safe and reliable options.

For period care that combines innovation and affordability, my mimi stands out. With two sizes, a loop tab for easy removal, and an eco-friendly design, it is trusted by thousands of Australians and ships quickly across Australia and New Zealand.

Health note

This article provides general information only and is not medical advice. Please consult a healthcare professional for personalised advice on contraception and period care.