1. What Is The Fertile Window?

The fertile window refers to the days in your menstrual cycle when pregnancy is possible. This typically occurs 10-16 days after the start of your period, with peak fertility around day 14 in a 28-day cycle.

2. How Does The Calculator Work?

The calculator uses standard fertility tracking principles:

Where:

• 10 days — Start of fertile window
• 16 days — End of fertile window
• 14 days — Estimated ovulation day

Explanation: This calculation is based on the typical 28-day menstrual cycle, with adjustments made for different cycle lengths.

3. Understanding Your Cycle

Details: The menstrual cycle is divided into phases: menstrual phase, follicular phase, ovulation, and luteal phase. The fertile window occurs during the transition from follicular phase to ovulation.

4. Using The Calculator

Tips: Enter your average cycle length (21-35 days) and the start date of your last period. For best accuracy, track your cycles for several months to determine your average cycle length.

5. Frequently Asked Questions (FAQ)

Q1: Is day 10-16 accurate for everyone?
A: This is a general guideline. Individual cycles vary, and some women may ovulate earlier or later than day 14.

Q2: How long does ovulation last?
A: Ovulation itself lasts 12-24 hours, but sperm can survive in the female reproductive tract for up to 5 days, creating a 6-day fertile window.

Q3: What are signs of ovulation?
A: Common signs include changes in cervical mucus, mild pelvic pain, basal body temperature shift, and positive ovulation predictor tests.

Q4: Can I get pregnant right after my period?
A: While less common, pregnancy is possible if you have a short cycle or long period, as sperm survival can bridge the gap to early ovulation.

Q5: How accurate is this calculator?
A: This provides an estimate. For precise fertility tracking, combine with ovulation predictor kits, basal body temperature charting, and cervical mucus monitoring.