// Input Interactions document.getElementById(‘periodDuration’).addEventListener(‘input’, function(e) { document.getElementById(‘periodDurationValue’).textContent = e.target.value; });function calculateSafeDays() { // Input Validation const name = document.getElementById(‘name’).value; const age = document.getElementById(‘age’).value; if (!name || !age || age 50) { alert(‘Please fill all required fields with valid values’); return; }// Calculation Logic const cycleLength = parseInt(document.getElementById(‘cycleLength’).value); const lastPeriod = new Date(document.getElementById(‘lastPeriod’).value); const periodDuration = parseInt(document.getElementById(‘periodDuration’).value);const nextPeriod = new Date(lastPeriod); nextPeriod.setDate(lastPeriod.getDate() + cycleLength);const ovulationDate = new Date(lastPeriod); ovulationDate.setDate(lastPeriod.getDate() + 14);const fertileStart = new Date(ovulationDate); fertileStart.setDate(ovulationDate.getDate() – 5); const fertileEnd = new Date(ovulationDate); fertileEnd.setDate(ovulationDate.getDate() + 1);const safeDaysStart = new Date(fertileEnd); safeDaysStart.setDate(fertileEnd.getDate() + 1);// Display Results document.getElementById(‘safeDaysResult’).textContent = `${safeDaysStart.toDateString()} – ${nextPeriod.toDateString()}`; document.getElementById(‘nextPeriod’).textContent = nextPeriod.toDateString(); document.getElementById(‘fertileWindow’).textContent = `${fertileStart.toDateString()} – ${fertileEnd.toDateString()}`;document.getElementById(‘resultSection’).style.display = ‘block’; }// PDF Generation function generatePDF() { const { jsPDF } = window.jspdf; const doc = new jsPDF();// Header doc.setFontSize(18); doc.text(‘Doseway – Safe Days Report’, 15, 15); doc.setFontSize(10); doc.setTextColor(100); doc.text(‘Generated: ‘ + new Date().toLocaleString(), 15, 22); // Content doc.setFontSize(12); let yPos = 35; // User Information doc.text(`Name: ${document.getElementById(‘name’).value}`, 15, yPos); doc.text(`Age: ${document.getElementById(‘age’).value}`, 15, yPos + 7); doc.text(`Gender: ${document.getElementById(‘gender’).value}`, 15, yPos + 14); // Results yPos += 30; doc.setFontSize(14); doc.text(‘Results:’, 15, yPos); doc.setFontSize(12); doc.text(`Safe Days: ${document.getElementById(‘safeDaysResult’).textContent}`, 20, yPos + 10); doc.text(`Next Period: ${document.getElementById(‘nextPeriod’).textContent}`, 20, yPos + 17); // Footer const pageHeight = doc.internal.pageSize.height; doc.setFontSize(10); doc.text(‘Contact: support@doseway.com | WhatsApp: +92318-6144650’, 15, pageHeight – 10); doc.text(‘Website: https://doseway.com/’, 15, pageHeight – 5);doc.save(‘safe-days-report.pdf’); }// Social Sharing function shareOnFacebook() { const url = encodeURIComponent(window.location.href); window.open(`https://www.facebook.com/sharer/sharer.php?u=${url}`, ‘_blank’); }function shareOnTwitter() { const text = encodeURIComponent(`My safe days calculation from Doseway: ${document.getElementById(‘safeDaysResult’).textContent}`); const url = encodeURIComponent(‘https://doseway.com/’); window.open(`https://twitter.com/intent/tweet?text=${text}&url=${url}`, ‘_blank’); }function shareOnLinkedIn() { const url = encodeURIComponent(window.location.href); window.open(`https://www.linkedin.com/sharing/share-offsite/?url=${url}`, ‘_blank’); }function shareOnWhatsApp() { const text = encodeURIComponent(`Check my safe days calculation: ${document.getElementById(‘safeDaysResult’).textContent}\nMore info: https://doseway.com/`); window.open(`https://wa.me/?text=${text}`, ‘_blank’); }

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Safe Days Calculator – Track Fertile & Non-Fertile Days After Periods

Free Safe Days Calculator

Understanding your menstrual cycle is key to natural family planning. A safe days calculator helps identify days when pregnancy is less likely after your period. This guide explains how it works, why it matters, and how to use it effectively.

What Are Safe Days?

Safe days are days in your menstrual cycle when the chance of pregnancy is low. These occur before ovulation (non-fertile window) and after ovulation ends.

Key Terms to Know

• Menstrual Cycle: The monthly cycle (average 28 days) starting from the first day of your period.
• Ovulation: Release of an egg from the ovary, usually around day 14.
• Fertile Window: 5-6 days when pregnancy is possible (includes ovulation day).
• Luteal Phase: Post-ovulation phase (12–16 days) until the next period.

Why Track Safe Days?

• Avoid pregnancy naturally without hormones or devices.
• Plan pregnancies by identifying fertile days.
• Understand your body’s cycle patterns.

How the Safe Days Calculator Works

This tool estimates safe days based on your cycle data. Here’s how:

Inputs Required

1. Cycle Length: Days from day 1 of your period to the next period.
2. Last Period Start Date: The first day of your most recent period.

Calculation Method

The calculator uses the calendar method (rhythm method) to:

• Predict ovulation (typically 14 days before the next period).
• Mark fertile days (5 days before ovulation + ovulation day).
• Identify safe days before and after the fertile window.

Example Calculation

Cycle Length	Period Start Date	Ovulation Day	Fertile Window	Safe Days
28 days	1st October	14th October	10th–15th Oct	1st–9th, 16th–28th

Understanding Your Results

The calculator will show:

1. Fertile Days: High pregnancy risk. Avoid unprotected sex.
2. Safe Days: Low pregnancy risk.
3. Ovulation Prediction: Estimated date of egg release.

Factors Affecting Accuracy

• Irregular cycles.
• Stress, illness, or hormonal changes.
• Sperm survival (up to 5 days in the body).

Tips for Better Accuracy

1. Track cycles for 6–12 months to find patterns.
2. Combine with the symptothermal method (check basal body temperature, cervical mucus).
3. Use ovulation predictor kits for confirmation.

Limitations of Safe Days Tracking

• Not 100% reliable (75–88% effectiveness).
• Requires consistent cycle tracking.
• Not suitable for irregular cycles.

Final Thoughts

A safe days calculator is a helpful tool for natural pregnancy prevention or planning. Always consult a healthcare provider for personalized advice.

FAQs