function calculateProbability() { // Base factors let probability = 0; const lmp = new Date(document.getElementById(‘lmp’).value); const cycleDays = Math.floor((new Date() – lmp) / (1000 * 60 * 60 * 24)); // Cycle calculation if (cycleDays > 35) probability += 30; else if (cycleDays > 28) probability += 15; // Contraceptive adjustment const contraceptive = document.getElementById(‘contraceptive’).value; if (contraceptive === ‘pill’) probability -= 40; if (contraceptive === ‘iud’) probability -= 50; // Symptoms if (document.getElementById(‘nausea’).checked) probability += 20; if (document.getElementById(‘fatigue’).checked) probability += 15; if (document.getElementById(‘breastTenderness’).checked) probability += 15; // Test result const testResult = document.getElementById(‘testResult’).value; if (testResult === ‘positive’) probability = 99; // Stress adjustment const stress = document.getElementById(‘stress’).value; probability -= stress * 0.5; // Cap probability between 0-99% probability = Math.max(0, Math.min(99, probability)); // Display results document.getElementById(‘results’).style.display = ‘block’; document.getElementById(‘probabilityValue’).textContent = `${Math.round(probability)}%`; document.getElementById(‘progressFill’).style.width = `${probability}%`; // Set color based on probability if (probability < 30) { document.getElementById('progressFill').style.backgroundColor = '#4CAF50'; document.getElementById('interpretation').innerHTML = '

Low probability of pregnancy. However, consult a healthcare provider for confirmation.

‘; } else if (probability < 60) { document.getElementById('progressFill').style.backgroundColor = '#FFC107'; document.getElementById('interpretation').innerHTML = '

Moderate probability. Recommend taking a pregnancy test and consulting a doctor.

‘; } else { document.getElementById(‘progressFill’).style.backgroundColor = ‘#F44336’; document.getElementById(‘interpretation’).innerHTML = ‘

High probability. Please consult a healthcare provider immediately.

‘; } }function generatePDF() { const doc = new jspdf.jsPDF(); // Header doc.setFontSize(18); doc.text(“Doseway Pregnancy Probability Report”, 15, 15); doc.setFontSize(10); doc.text(`Generated: ${new Date().toLocaleString()}`, 15, 25); // User Information doc.setFontSize(12); doc.text(`Name: ${document.getElementById(‘name’).value}`, 15, 35); doc.text(`Age: ${document.getElementById(‘age’).value}`, 15, 40); doc.text(`Gender: ${document.getElementById(‘gender’).value}`, 15, 45); // Results doc.setFontSize(14); doc.text(`Pregnancy Probability: ${document.getElementById(‘probabilityValue’).textContent}`, 15, 55); // Footer doc.setFontSize(10); doc.text(“Contact: support@doseway.com | WhatsApp: +92318-6144650 | https://doseway.com”, 15, 280); doc.save(‘pregnancy-report.pdf’); }// Social Sharing Functions function shareFacebook() { const url = encodeURIComponent(window.location.href); window.open(`https://www.facebook.com/sharer/sharer.php?u=${url}`, ‘_blank’); }function shareTwitter() { const text = encodeURIComponent(`My pregnancy probability result: ${document.getElementById(‘probabilityValue’).textContent}`); window.open(`https://twitter.com/intent/tweet?text=${text}`, ‘_blank’); }function shareLinkedIn() { const url = encodeURIComponent(window.location.href); window.open(`https://www.linkedin.com/sharing/share-offsite/?url=${url}`, ‘_blank’); }function shareWhatsApp() { const text = encodeURIComponent(`Check my pregnancy probability result: ${document.getElementById(‘probabilityValue’).textContent}`); window.open(`https://wa.me/?text=${text}`, ‘_blank’); }// Input Validation document.getElementById(‘stress’).addEventListener(‘input’, function(e) { document.getElementById(‘stressValue’).textContent = e.target.value; });

Try More Free Tools:

• Try our Pregnancy Chance Calculator By Age
• Try our Libido Score Analyzer (Hormone-Based)
• Try our Birth Control Effectiveness Calculator

Pregnancy Probability Estimator

What Is a Pregnancy Probability Estimator?

A Pregnancy Probability Estimator is an online tool designed to calculate the chances of pregnancy based on various menstrual and ovulation-related factors. It uses personal data like your cycle length, ovulation window, and the timing of sexual activity to give you an estimated percentage chance of conception.

This tool is helpful for:

• Couples trying to conceive (TTC)
• Women tracking fertility for awareness
• People are trying to understand their reproductive health better

Key Terms Used in This Calculator

Understanding the basic terms used in the calculator helps you know how the results are determined:

Term	Meaning
Ovulation	The release of an egg from the ovary typically occurs around day 14 of a 28-day cycle.
Fertile Window	The 6-day time frame when you are most likely to conceive (5 days before ovulation and the day of ovulation).
Cycle Length	The number of days from the first day of one period to the first day of the next.
Luteal Phase	The phase after ovulation until your next period begins. Usually lasts 12–16 days.
Conception Probability	The chance of sperm meeting an egg and resulting in pregnancy.
Intercourse Timing	Refers to when sex happens around your ovulation day.

Why These Terms Matter

Each of these factors plays an important role in fertility. Here’s why they are key:

• Ovulation is the only time during the cycle when pregnancy can happen.
• The Fertile Window gives a limited timeframe for conception, so knowing it helps improve chances.
• Your Cycle Length helps predict when ovulation will happen.
• The Luteal Phase ensures the body is ready to support a possible pregnancy.
• The Timing of Sex around ovulation is one of the biggest factors in getting pregnant.

How Does the Pregnancy Probability Calculator Work?

The calculator uses the following logic:

1. Cycle Length Input: You enter the length of your menstrual cycle (usually between 21 and 35 days).
2. First Day of Last Period: This helps the calculator estimate your ovulation date.
3. Intercourse Dates: You select the days when you had unprotected sex.
4. Ovulation Prediction: Based on your cycle, it estimates the most fertile days.
5. Probability Score: It calculates the chance of pregnancy (%) depending on how close the intercourse was to ovulation.

Formula-Based Estimation

The calculator uses research-backed data that shows sperm can live up to 5 days in the body, and the egg survives for about 24 hours. By comparing the dates of sex and ovulation, it estimates your pregnancy likelihood.

What Will the Results Show?

Once you enter your information, the calculator provides:

• Estimated Ovulation Date
• Fertile Window
• Chances of Pregnancy (%)
• Next Period Start Date (optional)

Result Example:

Result	Details
Ovulation Day	July 10, 2025
Fertile Window	July 6 – July 10
Sex Date	July 9
Pregnancy Chance	24%
Next Period Due	July 24, 2025

Who Should Use This Tool?

This calculator is ideal for:

• Couples trying to get pregnant – Helps plan the best days to try.
• Women tracking their cycle – Understand fertility patterns.
• People avoiding pregnancy naturally – By identifying unsafe days.

Limitations of the Pregnancy Probability Estimator

While this tool is useful, it has a few limitations:

• It does not confirm pregnancy.
• It assumes a regular menstrual cycle.
• Hormonal changes, stress, and health conditions may affect results.
• It does not consider fertility issues (e.g., PCOS, low sperm count).

How to Improve Your Chances of Getting Pregnant

Use the tool along with these tips:

• Track your cycle regularly.
• Maintain a healthy lifestyle and weight.
• Have regular intercourse during the fertile window.
• Avoid smoking and excessive alcohol.
• Take prenatal vitamins with folic acid.

When to See a Doctor

You should consult a healthcare provider if:

• You’ve been trying for 12 months (or 6 months if over 35) without success.
• You have irregular or missed periods.
• You suspect any fertility issues (e.g., PCOS, thyroid problems).

Final Thoughts

The Pregnancy Probability Estimator is a helpful guide to understanding your chances of getting pregnant. While it doesn’t replace medical advice or testing, it provides a clear estimate based on your cycle and intercourse timing. Whether you’re trying to conceive or simply tracking your fertility, this tool is a smart way to stay informed about your reproductive health.

FAQs