1. What Are Fertile Days?

Fertile days are the days in a woman's menstrual cycle when pregnancy is most likely to occur. This typically includes the 5 days before ovulation and the day of ovulation itself.

2. How the Calculation Works

The calculator estimates fertile days based on your menstrual cycle length:

For different cycle lengths, the calculator adjusts proportionally:

• Ovulation typically occurs about 14 days before the next period
• Fertile window is calculated as 6 days ending on ovulation day
• The calculation scales based on your cycle length

3. Importance of Tracking Fertile Days

Details: Knowing your fertile days can help with family planning, whether trying to conceive or avoid pregnancy. However, this method alone is not highly reliable for contraception.

4. Using the Calculator

Tips: Enter your typical menstrual cycle length in days (from first day of period to first day of next period). The average is 28 days, but normal ranges from 21 to 35 days.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculator?
A: It provides a general estimate. Individual cycles vary, and other methods (like basal temperature) are more precise.

Q2: Can I use this for birth control?
A: Not recommended as sole method. The calendar method alone has high failure rates.

Q3: What affects my fertile window?
A: Stress, illness, travel, and other factors can shift ovulation timing.

Q4: Are there signs of fertility besides dates?
A: Yes - cervical mucus changes, basal body temperature shifts, and ovulation pain can indicate fertility.

Q5: When should I see a doctor about fertility?
A: If under 35 and trying for 1 year without success, or over 35 and trying for 6 months.