Ask your period.
Get personal health insights from your period, collected easily at home
Your period holds more than we know.
You are not alone. We listen. Join theblood today to track your cycle and learn from doctors, hormonal health coaches, mental health experts and researchers. Together, we are making menstrual blood part of the health conversation.
For the first 1,000 members
Your first €69 includes everything: access to the community, monthly expert deep dives and your first test kit. Your next €69 is only charged 3 months after your kit ships. Every quarter brings a new health marker to test.
Secure your spot.
Ask experts & find your people on WhatsApp community. Track your cycle on our app.
Monthly deep dive: What's a normal period + meet the founders in a live workshop.
Monthly deep dive: Nutrition and your cycle. Live workshop with a nutritionist.
Once approved and available in your country. Expected 03/2027 in Germany.
Your next €69 is only charged 3 months after your kit ships. Until then, enjoy a new deep dive and live workshop every month.
Cycle tracking in the app, learning content and invitations to group events with doctors, hormonal health coaches, mental health experts and researchers.
One kit, lab analysis and an in-app report every quarter after launch. Expected 03/2027 in Germany, subject to development and CE marking.
For the first 1,000 members. Your next €69 is only charged 3 months after your kit ships.
Curiosity is the start of better care.
What you can use from day one, before the test kit launches.
Learn about your period
Track cycle dates, pain and bleeding in the app. Explore clear content on menstrual blood, the endometrium, PCOS, fertility and endometriosis. There are no personal lab results yet.
Learn from women’s health experts
Join monthly live workshops and Q&As with doctors, hormonal health coaches, mental health experts, researchers and other specialists, and ask your questions anytime in our WhatsApp community.
Follow emerging research
Hear how the research develops and apply for separate, voluntary studies.
Selected studies may offer expense compensation.
Eligibility varies. Participation is always optional and is not required for membership.The test kit we’re building.
We’re still building and testing the kit. Starting in Germany (expected 03/2027), we plan to expand to Austria, Switzerland and more European countries step by step.
Expert group sessions are included in your membership. Want to go deeper? You can book additional 1:1 appointments with selected specialists from our network. Membership is available worldwide. The kit is planned to launch in Germany first (expected 03/2027), followed by Austria, Switzerland and more European countries step by step. Your next €69 is only charged 3 months after your kit ships.
Your period is data.
We turn it into insights for every stage of your life.
Period Characteristics
Understand what the color, amount, texture and clotting of your period can tell you about your health.
Energy & Blood Sugar
Discover how your cycle influences your energy levels, metabolism and blood sugar regulation.
Cycle Pattern
See how often your period comes, how long it lasts, how regular it is, and what changes can signal.
Fertility
Get insights into your ovarian reserve and fertile window to support your reproductive health.
Peri-/Menopause
Understand how hormonal changes affect your body, with insights for perimenopause and menopause.
You are not alone. We listen.
For too long, menstrual blood has been discarded and symptoms have been dismissed. We believe it deserves serious research and that every person deserves to be heard. By joining early, you help make menstrual health history with us.
Collect at home
An active member receives a new kit each paid quarter once available locally. The price includes the kit, outbound and return shipping, and lab analysis.
Receive lab values
We plan to measure AMH, FSH and HbA1c from menstrual blood, subject to validation and the final CE-marked intended use.
See your context in the app
Your report is planned to explain those values alongside cycle length, pain, bleeding and clots that you record yourself. It may help you discuss concerns with a clinician; it will not diagnose PCOS, infertility or perimenopause.
Expert group sessions are included. Want to go deeper? Additional 1:1 appointments with selected specialists from our network can be booked separately. You can join from anywhere in the world. The test kit is planned to launch in Germany first (expected 03/2027), followed by Austria, Switzerland and more European countries step by step. Your next €69 is only charged 3 months after your kit ships.
A vital sign
you can actually see.
Your menstrual cycle is often described as a fifth vital sign. Your period is the part you can observe yourself — and changes in it are worth noticing.
Pain
How strong is it — and does it change your day?
Flow
How much do you bleed — and for how many days?
Clots
Do you notice them — and are they getting larger or more frequent?
Timing
How long is your cycle — and how regular is your own pattern?
Your period is personal.
Katharina and Alexandra are sisters, three years apart. They share family history, but their periods can still look and feel very different. That is the point: family history can add context, but your own pattern is the baseline that matters.
Katharina
Alexandra
Illustrative comparison; not patient data or a diagnosis.
What you can see is only the first layer.
Pain, flow, clots and timing tell you what your period feels and looks like. Menstrual blood gives us another layer to study: the biological material inside it.
The test we are building is designed to go beyond symptoms and measure selected biomarkers in menstrual blood — adding another piece of context to what you already know about your period.
See the test kitThe conversation, in motion.
Hear why we believe menstrual health deserves more attention and how theblood is asking new questions.
Two glimpses into theblood’s world. Tap a video to watch.
Why we ask better questions
A new perspective
Good questions.
Clear answers.
What do I get before the test kit arrives?
Access to our WhatsApp community, cycle tracking in the app and a new deep dive with a live workshop every month, starting with the founders in November.
When will the test kit be available?
We expect the first kits in Germany in 03/2027, followed by Austria, Switzerland and more European countries step by step. The kit needs regulatory approval first.
How does payment work?
You pay €69 today. Your next €69 is only charged 3 months after your first kit ships. After that, you pay €69 per quarter.
What does the founding-member price mean?
The first 1,000 members pay €69 per quarter instead of €99 and keep this price for life.
Can I join from outside Germany?
Yes. The membership, community and workshops are open worldwide. The test kit follows once it is available in your country.
What will the test measure?
We start with AMH, FSH and HbA1c and aim to add one new marker per quarter. Each marker speaks to one of your health areas: AMH to fertility, FSH to fertility and peri-/menopause, HbA1c to energy and blood sugar. With every new marker, you learn more about your body. The test gives you context, it does not diagnose conditions.
Can I cancel?
Yes, you can cancel anytime.
Is this scientifically grounded?
We developed a standardized pre-analytical method, the foundation that allows samples to be collected at home and reliably analyzed in the lab. The method is being validated together with SGS. A first study with the University of Rostock showed that vitamins A and D can be measured in menstrual blood (Whitbread et al., J Clin Med 2024). We’re at the beginning, and that’s exactly why we need you.
What happens to my data?
Your data belongs to you. We process it in accordance with the GDPR, store it on servers in the EU and only use it for research if you have given explicit consent.
Who benefits from my data?
You do first. Until now, mostly labs and pharma companies profited from health data. With theblood, your data only goes into research with your consent, stays pseudonymized or anonymized, and you share in the results.
Can I take part in research?
Yes, if you want to. You decide whether to release your sample for a specific research project. Beforehand, you receive all the information about the study: what it’s about, who’s involved and what happens to your sample. No sample is used without your explicit consent. If your sample goes into a project, you receive compensation of up to €250. The exact amount is shared with you before you consent.
Who is the membership for?
For everyone aged 18 and over who menstruates and wants to understand their body better and help shape research in women’s health.
I have another question.
Write to us at hello@theblood.io. We’ll reply personally.
Don’t wait for the test kit.
Start now.
Join theblood in October and get access from day one: exclusive monthly deep dives with experts, founder sessions, our private member community and priority access to retreats and special events. Your test kit follows as soon as it is approved and ready to ship in your country.
Be inside before the kit arrives.
Exclusive expert deep dives — every month
Go beyond surface-level health content with live sessions, Q&As and focused deep dives with selected women’s health experts.
Founder meetings
Hear directly from the founders about the science, the product, what we are learning and what we are building next.
Private member community
Join our WhatsApp groups, exchange with other members and stay close to new chapters, events and research updates.
Priority access to retreats & special events
Founding members hear first about selected theblood retreats, workshops and community experiences. Separate booking may apply.
Your test kit when it is ready
Once the test kit is approved and available in your country, active members are among the first to receive it.
For the first 1,000 members. Secure your access now and help us build what comes next in women’s health.
Help build what comes next.
Cancel anytime. Your next €69 is only charged 3 months after your kit ships. Retreats, 1:1 appointments and selected special events may require separate booking. Kit launch and availability depend on successful development and applicable regulatory requirements.