The fertile window is the roughly six-day stretch of each cycle when pregnancy is possible. It covers ovulation day and the five days before it, because sperm can survive in the female reproductive tract for up to five days, while the egg lives for about one day. The chance of pregnancy is highest on ovulation day and the two days before it. Knowing where this window falls in your cycle makes planning calmer and more informed.
Cervical mucus is one of the natural signs that the window is approaching. After your period it is usually dry or sticky, and as ovulation nears it becomes creamy, then watery, and finally slippery, clear and stretchy like raw egg white. That last texture signals the most fertile days. Jotting down your mucus briefly each day makes it easier to read your own body's signals after a few cycles.
Experts suggest that intercourse every other day during the fertile window is often enough for couples trying to conceive; scheduled sex every day is not necessary. The most accurate time for a pregnancy test is the day your period is late. Tests taken earlier can be negative even if you are pregnant. Keeping intercourse, mucus and test results in the same journal helps you get through the two-week wait more calmly and give your doctor clear information if needed.
What you can do
- Log intercourse, cervical mucus and pregnancy test results for each day.
- Choose mucus as dry, sticky, creamy, watery or egg white and read what each one means.
- Shows this cycle's fertile window and how many days of intercourse fell inside it.
- Gives a short guidance sentence based on your cycle phase.
- Reminds you that a test taken before a missed period can be a false negative, and suggests switching to pregnancy mode after a positive test.
- Jump straight to the basal body temperature and ovulation test screens.
How to use it
- Enter your cycle details in the period tracker so your fertile window can be calculated.
- Pick a day on the calendar and mark intercourse, mucus texture and any test result.
- Follow your fertile window and log summary on this cycle's card.
- When your period is late, take a pregnancy test and add the result to your journal.
Frequently asked questions
How do I calculate my fertile days?
Fertile days are calculated from ovulation day. Ovulation usually happens about 14 days before your next period. The fertile window starts five days before ovulation and ends on ovulation day. In a 28-day cycle this usually falls around days 9 to 14. If your cycle is irregular, backing up the calendar estimate with ovulation tests, cervical mucus and basal temperature tracking gives a more accurate result.
What does egg white cervical mucus mean?
Egg white cervical mucus is clear, slippery and can stretch between your fingers. It appears in the days close to ovulation, when estrogen is rising, and makes it easier for sperm to travel. That is why it is considered a sign of the most fertile days of the cycle. Not everyone notices it as clearly. Discharge that smells bad, is colored or itchy is not a fertility sign and may need an exam.
How often should you have sex to get pregnant?
Intercourse every other day during the fertile window is generally considered enough to keep the chance of pregnancy high. Having sex every day in the window does not clearly increase the odds and can put pressure on some couples. Having sex two or three times a week throughout the cycle is also an easy way not to miss your fertile days. What matters is that the process stays enjoyable and sustainable for both of you.
When should I take a pregnancy test?
The most reliable time for a home pregnancy test is the day your period is late. In earlier tests the pregnancy hormone may not have risen enough yet, and the result can be a false negative. First morning urine has the highest concentration of the hormone. If the test is negative but your period still does not come, repeat it a few days later. If the result is positive, see your doctor to confirm the pregnancy.