Science and research at Period Tracker
On a global level, female health has historically lacked personalized research. That’s why we built Period Tracker around user empowerment: combining smart predictive algorithms, AI health reports, and time-tested Ayurvedic remedies to give women full ownership of their reproductive well-being.
Designed for Women, Grounded in Real Science
Our team is committed to finding new ways to support groundbreaking app features and addressing the gaps in female health science.
AI-Driven Insights
Smart mathematical pattern analysis for rolling cycle shifts
Private & Confidential
Your intimate cycle records never leave your local mobile sandbox
Natural Herbal Relief
Ancient herbal infusions & dietary remedies for menstrual cramp comfort
Global Community
Trusted by hundreds of thousands of women across 140+ countries
In the Period Tracker app, you'll find the lowdown on what to expect cycle by cycle. Plus a smart AI health report and all the Ayurvedic natural remedies you need — whether you're wondering about fertile days or why you might be experiencing a certain symptom.
Standardized Obstetric Formulas & Gestational Benchmarks
Our cycle predictions and pregnancy calculators adhere strictly to standardized clinical formulas established by the American College of Obstetricians and Gynecologists (ACOG) and the World Health Organization (WHO).
Key Standards & Fact Checklist
- Naegele's Rule: Calculates estimated date of delivery (EDD) by adding 280 days (40 weeks) to the first day of the last menstrual period
- Parikh's Formula: Dynamically adjusts gestational due dates for women whose cycles naturally deviate from the standard 28-day model
- 14-Day Luteal Standard: Anchors ovulation 14 days prior to expected bleeding rather than 14 days after period onset
- Crown-Rump Length (CRL) Correlation: Aligns gestational age calculations with standard first-trimester ultrasound tables
Beta-hCG Doubling Kinetics & Logarithmic Modeling
Human chorionic gonadotropin (hCG) is the hallmark biochemical marker of early pregnancy. Our hCG doubling calculator uses logarithmic rate equations to calculate true doubling time in hours.
Key Standards & Fact Checklist
- Exponential Doubling Equation: Doubling Time = [ln(2) * (Time2 - Time1)] / [ln(hCG2) - ln(hCG1)]
- Early Gestation Kinetics: Under 1,200 mIU/mL, viable intrauterine pregnancies typically double every 48 to 72 hours
- Mid-Level Dynamics: Between 1,200 and 6,000 mIU/mL, normal doubling times naturally lengthen to 72 to 96 hours
- Plateau Phase: hCG reaches a biological peak around weeks 8–10 (100,000–200,000 mIU/mL) before declining to steady second-trimester levels
Ovulation Prediction & Mathematical Probability Windows
Fertility prediction is governed by the finite biological lifespan of gametes. Our algorithm models a 6-day fertile window reflecting verified sperm and oocyte physiology.
Key Standards & Fact Checklist
- Sperm Capacitation & Survival: Sperm can survive in fertile alkaline cervical fluid for up to 120 hours (5 days)
- Oocyte Viability: An ovulated egg remains viable for fertilization for strictly 12 to 24 hours post-rupture
- Peak Conception Days: Intercourse 1 to 2 days prior to ovulation yields the highest clinical conception probability (approx 25–30%)
- Conception Day vs. Intercourse Day: The day of fertilization may occur up to several days after intercourse took place
Transparent Communication & Educational Framing
We believe in honest, transparent technology. We clearly emphasize that mathematical models and digital calculators are empowering educational tools designed to support your personal wellness journey, not a substitute for clinical diagnostics.
Key Standards & Fact Checklist
- Clear Educational Disclaimers: Highlight the inherent biological variability that no algorithm can foresee
- When to Seek Clinical Care: Clear prompts to consult licensed healthcare professionals for abnormal bleeding or severe pain
- Ultrasound Confirmation Priority: Recommends early clinical ultrasound as the definitive medical standard for pregnancy dating
- No False Guarantees: Rejects unrealistic claims of 100% predictive certainty in biological systems
Continuous Review by Women's Health Specialists
Our scientific literature database and algorithmic assumptions undergo continuous peer-review and scrutiny by reproductive health contributors.
Key Standards & Fact Checklist
- Evidence-Based Updates: Algorithms are revised whenever new peer-reviewed studies update gestational benchmarks
- Cross-Validation Testing: Synthetic cycle models test algorithmic edge-cases (cycles ranging from 20 to 50 days)
- Clarity in Language: Translates complex endocrinological and biometric terms into easy, accessible guidance
- Global Scientific Standard: Adheres to international medical conventions used across global healthcare systems
Frequently Asked Questions
Clear answers to common questions regarding Reproductive Formulas & Benchmarks
What formula is used to calculate my pregnancy due date?+
What is considered a normal hCG doubling time in early pregnancy?+
Why does ovulation always occur 14 days before the next period, rather than 14 days after the last period?+
Can an online calculator replace a medical ultrasound scan?+
Closing the global divide in female health science
Historically, women’s reproductive studies were concentrated in narrow geographic regions. Period Tracker delivers free, localized cycle tools and predictive health models to women and families across Nigeria, Africa, and communities worldwide.