How to Use a Conception Calendar

Using a conception calendar can help you to chart your fertility cycle. Since pregnancy usually occurs during ovulation, determining when ovulation takes place will tell you what days you are most likely to become pregnant. This process is also known as Natural Family Planning.

Things You'll Need

  • calendar
  • basal thermometer

Instructions

    • 1

      Calculate your average monthly cycle by counting the days between the first day of each menstrual cycle for a few months.

    • 2

      Make note of changes that may cause your cycle to be irregular. If it's consistently irregular, you may have to rely more on cues like basal temperature or cervical mucus changes.

    • 3

      Create or download a conception or ovulation calendar. The number of days between your cycles is the number of squares that should be placed on the calendar. Mark day one with an "X" to indicate the first day of your period.

    • 4

      Mark the days when you are ovulating and most fertile on the calendar. If your cycle time is 28 to 32 days, the time when you are fertile is generally between days 11 and 21.

    • 5

      Use a basal thermometer to record small changes in your temperature. When ovulating, your temperature will rise less than one degree. Chart your temperature each day on your calendar, and notice when there is a sharp increase. These are the days when ovulation is taking place. Chart your temperature for several months to rule out temperature changes from other reasons like illness, drugs or sleepiness.

    • 6

      Be aware of the consistency of your cervical mucus. During ovulation, it will become clearer and stretchy. Mark down the days when it is most stretchy and abundant on your calendar.

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