Ovulation tracking, without all the tracking
Trying to conceive?Know your window, automatically.
Femora's smart underwear tracks five ovulation signals continuously — pH, discharge, skin temperature, heart rate and HRV — to help you time conception with confidence, simply by wearing it.
Just wear it.
How Femora works
Your body leaves clues. Femora brings them together.
Just wear Femora
Soft, breathable cotton underwear with sensors knitted right into the fabric. It feels like your favorite pair.
Embedded fabric sensors
While you wear them, the sensors continuously read five reproductive signals — no action needed from you.
Snap on & connect
The detachable unit clicks onto the waistband and syncs securely to the app. Your patterns reveal themselves.
What we measure
5 signals that shift around ovulation
Vaginal pH
Detect meaningful changes earlier.
Discharge patterns
Understand your cycle with more confidence.
Skin temperature
Reveal your personal monthly rhythm.
Heart rate
See how your body responds day to day.
Heart rate variability
Understand your resilience and wellbeing.
Safe. Washable. Effortless.
Quick answers
The short version.
Femora surfaces your fertile window and the signal shifts that surround ovulation. It's a wellness tool — it doesn't clinically confirm that ovulation occurred, but it shows you the patterns that matter.
Yes — that's who it's for. Femora doesn't assume a textbook cycle; it learns yours and updates predictions as your timing changes.
You can wear it and see your signal data, but hormonal birth control suppresses the cyclical shifts Femora reads, so cycle predictions aren't meaningful. It's not a contraceptive tool.
Yes — cold wash in the included laundry bag, air dry. The sensors are knitted in, not glued on, and testing covers repeated wash cycles.
Have a question?
Talk to our founder.
Book a free 1:1 with Parnia — ask anything about the product, the science, or which bundle fits your journey. No sales scripts, just real answers.
“I read every message myself — promise. ♡”
Parnia M., Founder & CEO, Femora
Personalized cycle insights
Your cycle changes. Femora helps you understand it.
Trusted by experts
The people who support women's health, backing Femora.
Fertility is a puzzle with many pieces — stress, sleep, nutrition, timing. A wearable that reads signals continuously instead of asking women to log them is the direction the field needs.
Dr. Amara Osei
Naturopathic Doctor, Integrative Fertility Care
My clients are exhausted by tracking. When they can simply wear something and still see their patterns, adherence changes completely — and so does the conversation we have in session.
Teresa Alvarez, RHN
Fertility Nutritionist, Live Well Nutrition
Temperature alone tells a fraction of the story. Combining skin temperature, heart rate, HRV and discharge patterns is what makes cycle interpretation genuinely personal.
Dr. Lena Forgacs
Reproductive Health Researcher
The most exciting thing about Femora is the sense of control it gives women back. Understanding your own data is empowering in a way a prescription pad can't be.
Dr. Parvaneh Saidi, MD
CEO & Co-founder, Elan Women's Health
So many of the women we support feel blindsided by their own cycles. Tools that make patterns visible earlier give them time — and time is everything on this journey.
Isabelle Fontaine
Executive Director, Fertility Friends Foundation
As a fertility support network, we see the emotional cost of uncertainty daily. Continuous, passive insight is not a luxury — it's compassionate design.
Erin Forsey
Co-founder, Oasis Fertility Support Network
0M+
Biomarker data points
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Women in our community
0K+
Minutes of real-world wear
Designed with privacy, safety and comfort in mind. Built on millions of signals.
What makes the difference
Built for your cycle — not just predictions.
Illustrative comparison for general guidance — every body and every tool is different.
Find your perfect fit
Choose the Femora that best fits your routine.
Femora Early Bird
“The Founders Offer”
Only 20 spots remaining
- 1 Detachable Electronic Unit (DEU)
- 2 smart underwear pairs — free
- Free silk pouch bag
- Free shipping in Canada & U.S.
- Lifetime premium app access
Femora Essentials
“Wear one. Wash one.”
- 3 smart underwear pairs (2 + 1 free)
- 1 Detachable Electronic Unit (DEU)
- Free silk pouch bag
- Free shipping in Canada & U.S.
- Lifetime premium app access
Femora Complete Week
“One for every day.”
- 7 smart underwear pairs (5 + 2 free)
- 1 Detachable Electronic Unit (DEU)
- Free silk pouch bag
- Free shipping in Canada & U.S.
- Lifetime premium app access
Community voices
What women are saying.
Quotes from our community and pilot wearers — lightly edited for privacy.
“I stopped setting 6am thermometer alarms and my data got better. That alone sold me.”
“It told me my fertile window had shifted by four days. Nothing else ever caught that.”
“Wearing it feels like nothing. Checking the app feels like finally getting answers.”
“My cycles are irregular thanks to PCOS, and this is the first tool that didn't make me feel broken.”
“No more logging at midnight. It just knows. I cried the first week, honestly.”
“I was skeptical about washing electronics — it's been through thirty washes and still works perfectly.”
“The patterns view showed me my luteal phase is short. My doctor took me seriously for the first time.”
“Tried three apps, two thermometers, and OPKs. This is the first thing that didn't add work to my life.”
“It's the first period tracking experience that feels designed by people who get it.”
“My husband and I stopped guessing. The app made the whole journey feel less like a lottery.”
“The founder call was lovely — real conversation, no pressure. The product is even better.”
“Discreet, comfortable, and the insights actually match how I feel day to day.”
Deep dive
Everything you're wondering.
Femora surfaces your fertile window and the signal shifts that surround ovulation. It's a wellness tool — it doesn't clinically confirm that ovulation occurred, but it shows you the patterns that matter.
Yes — that's who it's for. Femora doesn't assume a textbook cycle; it learns yours and updates predictions as your timing changes.
You can wear it and see your signal data, but hormonal birth control suppresses the cyclical shifts Femora reads, so cycle predictions aren't meaningful. It's not a contraceptive tool.
Yes — cold wash in the included laundry bag, air dry. The sensors are knitted in, not glued on, and testing covers repeated wash cycles.
Most wearers see their first meaningful patterns within one full cycle. The app gets smarter the longer you wear it.
No. The unit stores data on board and syncs whenever you open the app — even days later.
Completely. The unit is the size of a small coin, sits flat inside the waistband, and nothing shows under clothing.
You're covered by our 30-day money-back guarantee. Reach out and we'll make it right.
Be part of the future of women's health.
Get the electronic unit plus two free pairs of smart underwear for US$99.99 — limited to the first 50 units, while helping shape what comes next.