Cycle Testkit

An Evolution in Menstrual Health

Finally, answers from your menstrual blood.

The Cycle Testkit is the first and only menstrual blood test clinically validated to deliver personalized, longitudinal health insights for women. From monitoring reproductive hormones to tracking early signs of perimenopause and fertility issues.

  • Menstrual blood offers unique insights that no other sample can provide—hormones, cells, and proteins that reveal the state of your reproductive health. Unlike one-time tests, the Cycle Testkit allows you to track changes over time, helping you understand shifts in fertility, early signs of perimenopause, and more.

  • No more guessing games with your health. Constant UTIs? Mood swings? The Cycle Testkit connects the dots, showing how your hormones may be influencing these recurring symptoms. Finally, gain the clarity you need to make informed decisions for your well-being.

  • Designed to support you at every stage, the Cycle Testkit delivers crucial information on fertility and perimenopause. Detect hormonal shifts that impact fertility, and stay ahead of early signs of menopause-related changes—all from the convenience of home.

Personalized Insights

Hormonal Health

The Cycle Testkit provides you with insights into your reproductive health, helping you understand your body’s readiness for conception and any early changes as you approach perimenopause.

Regular Screening

By tracking these shifts over time, you gain a clearer, more personalized picture of your health. This way, you can see patterns or changes as they happen, which might explain certain symptoms or moods.

Non-Invasive Collection

This test is super easy to do at home. You don’t need needles or a trip to the doctor—just collect a sample during your period and send it in. It’s designed to fit right into your monthly routine without any hassle.

Welcome to
the Future of
Women’s Health.

Period Pain isn’t normal.

Experience next-level menstrual healthcare with our cutting-edge menstrual blood test, providing innovative and integrative care you can trust.

  1. Activate

Scan your QR code on the transport container and activate your test.

2. Menstruate

On the 2. day of your period, use a menstrual cup.

3. Prepare

Wash your hands and have your test kit ready. Before removing your menstrual cup, take the tube out of the transport container.

4. Fill

Remove your cup, pour the blood into the small tube, gently press the cup sides if needed.

5. Send

After filling the sample, please mail it back to us using the provided envelope and shipping label.

Every month,
real answers for your health.


By using the Cycle Testkit, you’re not only gaining insights into your own health but also supporting a mission to transform women’s healthcare. Menstrual blood—a powerful yet underutilized source of health data—contains cells, hormones, and unique proteins that provide critical information about reproductive and overall health. Historically, medical research has focused primarily on male data, creating significant gaps in understanding women’s unique biology.

theblood is dedicated to closing this gender data gap by advancing menstrual blood research to track hormone shifts, detect early health indicators, and address issues like fertility and perimenopause. Each Cycle Testkit used brings us closer to establishing menstrual blood as a valuable and respected resource in health diagnostics, laying the groundwork for a scientifically-informed future in women’s healthcare.

Menstrual Blood as a Vital Health Insight

For all women.

There is still so much to learn from menstrual blood, and we are just at the beginning.

We see our menstrual blood test as the foundational basis for a comprehensive digital health platform that will empower women with personalized health insights and support, whilst generating the data needed to accelerate closuse of the gender health gap.

Science is our Foundation.