The thermal contraception method already exists: it is documented, reliable, and supported by several pioneers in the field — including Dr. Mieusset at Toulouse University Hospital, ARDECOM, and the General Medicine Congress. Yet despite its effectiveness and simplicity, it remains largely unknown and rarely used.

Through observations, research and conversations, one question emerged: why does this male contraceptive method remain marginal despite its proven potential?

Reading led to more questions. Why is contraceptive equality still not a more widely discussed issue? Why does contraceptive responsibility continue to fall so overwhelmingly on women? Why do men still have so little control over their own fertility? After all, conception involves two people — why shouldn’t contraception?

And why is this method discovered so late, when contraception lies at the heart of intimate life for so many heterosexual couples?

The method exists, but the ecosystem needed for its widespread adoption does not. No contraceptive device truly designed for everyday life. No structured medical pathway. No clear language to talk about it.

Gradually, the question evolved from “Why isn’t this method more widely used?” to “What needs to be built to make it accessible, simple and fully embraced?”

A few years ago, Gaëlle laid the first foundations of 37 DEGRÉS as part of her graduation project at ENSCI–Les Ateliers. She later met Matthieu, and together they shared their analyses, perspectives and personal experiences. Common ambitions quickly emerged: to open up the conversation around equality, inclusivity and trust within intimacy — and finally give male contraception a rightful place. The project began to take shape.

This marked the beginning of an iterative process: design, testing, adjustments and technical collaborations. The objective was clear: to create more than an effective medical device. The ambition was to design a contraceptive boxer that could naturally integrate into everyday life — following the body and its movements without discomfort or constraint.

Design became a tool in the service of male contraception: making it simple, comfortable, reliable and desirable.

A multidisciplinary committee of experts was brought together around the project, including doctors, researchers, healthcare professionals and textile specialists.

The brand takes shape. A clear direction emerges: institutional support begins to build, and 37 DEGRÉS reaches the first defining milestones in the life of a start-up. Step by step, non-dilutive funding is secured — including grants from Bpifrance, the Abeille Assurances Health Prize and honorary loans — allowing the development of the boxer to move toward completion.

The next stage is already underway: the CE marking process has begun, an initial fundraising round is in progress, and both pre-clinical and clinical trials are being structured.

Industrialisation and the launch of pre-orders: this year will also mark the completion of pre-clinical trials for the 37.1 contraceptive boxer, followed by the launch of a large-scale clinical trial aimed at obtaining CE marking.

37 DEGRÉS is entering a new phase — moving from prototype to product, from the laboratory to real-life user testing.