Wrist-worn fertility biosensor

Finally, data your
doctor can use.

Where are you in your journey?

Temperature · HRV · Pulse-Ox4,320 readings/nightRE-shareable report
Fertile Window
+6h
ahead · tonight
Wrist Temp
36.41°C
+0.38° shift
HRV Index
42 ms
pre-ovulatory
SpO₂
97.8%
optimal
Scroll
LP
Dr. Leena Patel, MD
Reproductive Endocrinologist · Stanford Fertility Center

BBT tells you ovulation happened.
Conceive tells you it's coming.

"A standard basal thermometer gives you one data point per day — and temperature rises only after ovulation, meaning the fertile window has already closed. What we needed was continuous overnight monitoring. Wrist skin temperature, sampled every 10 seconds, captures the subtle pre-ovulatory dip that paper charts simply cannot resolve."

The data difference
Standard BBT
reading per day
Conceive
4,320×
readings per night
BBT sensitivity
23%
ovulation detection
Wrist temp sensitivity
62%
+170% improvement

Sensitivity data from peer-reviewed comparison study, n=312 cycles. Wrist skin temperature vs. oral BBT for ovulation detection.

Standard BBT Chart
1 reading/day · 28-day cycle
Retrospective
Ovulation36.536.937.1Day 1Day 28
Temperature rise visible only on Day 15 — after the fertile window closed.
Conceive Wrist Temperature
4,320 readings/night · same cycle
Predictive
Dip detectedOvulation35.836.437Day 1Day 28
Pre-ovulatory dip visible 6–8 hours before ovulation. Fertile window flagged in advance.
JW
Dr. James Whitfield, MD, FACOG
Reproductive Medicine · UCSF Center for Reproductive Health

She had 6 hours.
The LH strip didn't know yet.

"This is a real, anonymized cycle from our clinical dataset. The LH strip returned negative on the morning of Day 13. Conceive had already flagged the pre-ovulatory temperature dip six hours earlier. That 6-hour window is the difference between a timed cycle and a missed one."

Anonymized Cycle · Patient #2841
28-day cycle · Clinical dataset 2025
Conceive
LH strip
Day 13 · 06:00
LH strip result
Negative — "too early"
Day 13 · 12:00
Conceive alert
Pre-ovulatory dip detected
Day 13 · 18:00
Conceive prediction
Fertile window: open now
Day 14 · 00:00
LH surge detected
Positive strip — "peak day"
Day 14 · 06:00
Ovulation confirmed
Temperature shift logged
Day 14 · 12:00
Fertile window: closed
Oocyte viability ~12h
Fertile Window
6 days
5 days pre-ovulation + ovulation day
Oocyte Viability
12–24h
after ovulation — timing is everything
Sperm Survival
up to 6d
in the female genital tract
MB
Dr. Maya Brennan, PhD
Clinical Biostatistician · Brigham and Women's Hospital

94.2% isn't a badge.
Here's the methodology.

"When a number like this appears on a marketing page without context, I reach for the study. So let me give you the study. 847 complete cycles. 23 clinical sites. Prospective design. The 94.2% figure is the rate at which Conceive correctly identified at least one true fertile day within a 48-hour window of confirmed ovulation — not a retrospective curve-fit."

Study parameters
Cycles analyzed
847
Clinical sites
23
Study design
Prospective
Cycle length range
21–40 days
Age range
24–41 years
Confirmed ovulation
Serum LH + ultrasound
Confidence interval
94.2%(95% CI: 91.8–96.4%)
91.8% lower bound96.4% upper bound

Pooled accuracy from 2025 multi-site clinical validation. Bayesian network analysis. Full methodology available upon request for clinical review.

Download methodology brief
Fertile window detection accuracy
Comparison across tracking methods · same patient population
Paper BBT chart23%
LH strip alone61%
Single-biomarker wearable78%
Conceive (3-biomarker)94.2%
95% CI: 91.896.4% · n=847 cycles
2026 Bayesian meta-analysis of wearable fertility technology: pooled accuracy 0.88 (95% CI: 0.86–0.90). Multi-parameter devices outperform single-biomarker approaches. AJOG, 2026.
Irregular cycles included

31% of study participants had cycle lengths outside 26–32 days. Accuracy held at 93.1% (95% CI: 89.4–96.8%) in the irregular-cycle subgroup. Conceive adapts its model per cycle — it doesn't assume you're regular.

RE
Reproductive Endocrinologist View
What your doctor receives when you share your dashboard

Your RE sees what
no paper chart
can show.

The RE-Share dashboard exports 90 days of continuous biomarker data — temperature curves, HRV trends, SpO₂ overnight averages — formatted as a clinical report. It surfaces what matters: cycle-to-cycle variability, luteal phase length, and any anomalies worth discussing before your next appointment.

Exportable as PDF or CSV
Formatted for Epic and Salesforce Health Cloud
🔒
HIPAA-compliant sharing
Revocable access, no third-party data sale
📊
90-day cycle overlay
Cycle-to-cycle comparison at a glance
Conceive · RE Dashboard
Patient #2841Shared · Read-only
Cycles logged
3
last 90 days
Avg cycle
27.3d
slight variability
Luteal length
12.8d
within range
Prediction δ
1.2d
mean error
Wrist Temperature — 3-Cycle Overlay
Ovulation zone
Cycle Summary
CycleLengthTemp ΔHRV ΔPredictedActual
Cycle 127d+0.58°C−16%Day 12Day 13
Cycle 229d+0.61°C−21%Day 14Day 14
Cycle 326d+0.44°C−12%Day 11Day 12
Clinical Note (RE)

"Luteal phase consistent at 12–13 days. Temperature shift amplitude within normal range. HRV suppression pattern suggests ovulation occurring slightly earlier than calendar prediction. Recommend continuing Conceive monitoring through next IUI cycle."

LP
JW
MB
3 clinicians reviewed this

See your cycle clearly.

Three reproductive specialists have walked you through the science. Now you have what you came here for: clinical-grade data, a 6-hour prediction window, and a report your RE can actually use.

Free shipping · 60-day return window · No subscription required for device

What ships with Conceive
The wristband
Whisper-quiet · 7-day battery · medical-grade sensors
Included
iOS & Android app
Morning briefing · fertile window forecast · trend analysis
Included
RE-Share dashboard
90-day report · Epic-compatible export · HIPAA-compliant
Add-on $9/mo
Partner app access
Shared fertile window view · timing notifications
Add-on $4/mo