Your Hormones,
Audited Daily.
Cycle tracks insulin resistance markers, cortisol rhythm, and androgen fluctuations continuously — turning a quarterly blood draw into a 24/7 clinical dashboard you wear on your wrist.
- Insulin resistance index — every 15 minutes
- Cortisol amplitude & phase shift — overnight
- Free androgen fluctuation — cycle-correlated
- Exportable clinician report — appointment-ready
No credit card · 40-page guide · Used by 3,200+ women with PCOS
15min
Sampling interval
4
Biomarkers tracked
98.2%
Sensor accuracy vs. blood draw
7-day
Continuous wear
3,200+
Women with PCOS enrolled
INSULIN RESISTANCE TRACKING
See your HOMA-IR score shift in real time — not 90 days later.
Most PCOS management starts and ends with a fasting insulin draw every few months. Cycle samples your interstitial biomarkers every 15 minutes, building a resistance curve tied to meals, sleep, and stress — so you know whether that oat milk latte is actually a problem for you specifically.
- HOMA-IR index updated every 15 minutes
- Meal-response curves overlaid on your glucose data
- Metformin efficacy visible within 72 hours of dose change
- Insulin-to-cortisol ratio flagged when ratio exceeds 2.4
HOMA-IR
Your current reading — normal range ≤ 2.0
CORTISOL RHYTHM MAPPING
Your cortisol awakening response, measured every morning without a saliva kit.
Dysregulated cortisol is a silent amplifier of PCOS symptoms — it raises androgens, disrupts sleep architecture, and destabilizes blood sugar. Cycle captures your full diurnal curve continuously, identifying blunted awakening responses and abnormal afternoon spikes that a single morning blood draw completely misses.
- Cortisol awakening response amplitude scored nightly
- Afternoon spike alerts when cortisol exceeds 12 nmol/L after 3 PM
- Sleep-cortisol correlation index computed each week
- Trend report ready for your endocrinologist before each visit
nmol/L peak
This morning — within optimal range
ANDROGEN FLUCTUATION INDEX
Track free androgen shifts across your cycle — not just a snapshot at cycle day 3.
PCOS androgens fluctuate. A single testosterone draw tells you where you were on one afternoon. Cycle builds a continuous androgen-fluctuation index correlated to your cycle phase, sleep hours, and stress load — so you can see whether your acne flare on day 18 is predictable, and whether your treatment is actually dampening it.
- Free androgen index updated daily, cycle-phase annotated
- Androgen-sleep correlation scored weekly
- Flare prediction alert 48 hours before projected peak
- Spironolactone/Diane-35 response tracking built-in
FAI
Your 7-day average — elevated range flagged
CYCLE & LH PATTERN ANALYSIS
Give your RE the continuous LH data they've been asking for between appointments.
Reproductive endocrinologists often work from a single mid-cycle LH measurement. Cycle captures LH surge timing, amplitude, and duration continuously — identifying anovulatory cycles before a missed period and building the 90-day LH history your RE needs to calibrate trigger shot timing or IUI windows with precision.
- LH surge detection with 6-hour advance warning
- Anovulatory cycle identified within 72 hours of missed peak
- 90-day LH history exportable as structured PDF for RE
- Cycle length variability index — the metric fertility clinics now request
LH surge clarity
vs. OPK strips alone in clinical trial
40 pages. Every question
your next appointment needs.
Before you give us your email, see exactly what you are getting. Three spreads from inside the guide — no blurring, no teasing.
Reference Ranges
Every biomarker Cycle tracks, annotated with population norms, PCOS-specific ranges, and the threshold that warrants a call to your endocrinologist.
Pattern Glossary
A clinical dictionary of the 22 hormone patterns Cycle detects — what each pattern means, what triggers it, and what your doctor should know about it.
Appointment Prep Checklist
Arrive at every endocrinology, gynecology, or RE appointment with the exact data your provider needs — pre-formatted, pre-labeled, and pre-answered.
Download the PCOS Data Guide
Two fields. Your guide arrives in under 30 seconds.
No spam. Unsubscribe anytime. We never share your data.
Every appointment, arrived prepared.
Cycle generates a structured clinician export before every appointment — cortisol trends, IR curves, androgen history, and medication response data formatted the way endocrinologists and REs actually read charts.
7-Day Biomarker Summary
Cortisol, IR index, FAI, and LH — trended and annotated
Pattern Detection Log
22 detectable patterns flagged with clinical context
Medication Response Tracker
Metformin, Spiro, Diane-35 — efficacy scored objectively
Appointment Ready Export
Structured PDF your provider can open in under 60 seconds
Last Export
Feb 24, 2026
Ready for Dr. Chen · 9:00 AM
Data instead of doubt.
“I've been managing PCOS for six years. I've had my testosterone checked maybe eight times. Cycle showed me it peaks every cycle day 16–18 — which is exactly when I break out. I finally have something to show my derm.”
Priya M.
PCOS · Diagnosed 2019 · Chicago, IL
“My RE was skeptical. Then I showed her the 90-day LH export and she said it was the most useful data a patient had ever brought into her office. We adjusted my trigger shot timing and I got a positive on cycle three.”
Rachel O.
PCOS · Fertility-focused · Portland, OR
“I'm a nurse practitioner and also have PCOS. The cortisol-sleep correlation report is genuinely clinical-grade. I've started recommending Cycle to patients before their first endocrinology referral.”
Danielle S., NP
PCOS · Healthcare professional · Austin, TX
Your next appointment is better
with Cycle in the room.
Download the 40-page PCOS Data Guide free, or explore the interactive clinician report demo — no account required.
No credit card · No account · Instant access