Cycle Testkit

A Revolution 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 fertility issues and early signs of perimenopause.

  • Menstrual blood offers real insights into your reproductive health that regular blood testing methods simply cannot provide. With endometrial cells, unique proteins, and more, it provides a snapshot of your uterus without going under the knife! Unlike one-time tests, the Cycle Testkit allows you to track vital health signs from your menstrual blood over time, including the intricate balance of key hormones. This helps you better understand your symptoms, fertility issues, and even changes related to perimenopause, giving you a clearer picture of your health at every stage of life.

  • No more guessing games with your health. Constant fatigue? Sleep issues? Difficulties with conceiving? The Cycle Testkit connects the dots, helping you to understand how your hormones may be impacting your struggles. Finally, gain the clarity you need to make informed decisions for your well-being.

  • Designed to support you at every stage, the Cycle Testkit provides valuable insights into hormonal changes related to fertility and perimenopause. Track fluctuations in key hormones that can affect fertility and identify early indicators of perimenopausal changes—all from the comfort of your home.

Personalized Insights

Hormonal Health

The Cycle Testkit offers insights into your reproductive health, helping you better understand hormonal patterns that affect fertility, identify potential issues impacting conception, and recognize early hormonal shifts associated with perimenopause.

Regular Screening

By monitoring hormonal shifts over time, the Cycle Testkit helps you build a clearer, more personalized understanding of your health. This allows you to identify patterns or changes that could explain symptoms, mood fluctuations, or other cycle-related concerns.

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, using a menstrual cup 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 2nd 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 period,
real answers for your health.


By using the Cycle Testkit, you’re not only gaining valuable insights into your own health but also contributing to advancing women’s healthcare. Menstrual blood—an often overlooked but highly informative biological sample—contains endometrial cells, hormones, and unique proteins that offer crucial information about reproductive and overall health. Traditionally, medical research has been heavily male-focused, leading to significant gaps in understanding the complexities of women’s biology.

theblood is committed to closing the gender data gap by advancing menstrual blood research to monitor hormonal fluctuations, identify early health indicators, and address concerns like fertility and perimenopause. Every Cycle Testkit used helps pave the way for menstrual blood to be recognized as a vital resource in health diagnostics, contributing to a more scientifically informed and equitable 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 closure of the gender health gap.

Science is our Foundation.