How to prepare a pregnancy calendar ?
Your past menstrual cycles will work as a guide for estimating your fertile times. In order to track your menstrual cycle and to identify your expected ovulation follow the step by step process below:
Step 1: Plan on tracking your menstrual cycle for 8 to 12 months.
Step 2: Day 1 will be the first day you start menstruation.
Step 3: Pick the longest and shortest of the cycles from your monthly tracking.
Step 4: The first day of your fertility period is determined by subtracting 18 days from the length of your shortest cycle. If 26 days was your shortest menstrual cycle, take 26 and subtract 18 to come up with the number 8. This means that the first day of your fertility window starts on the 8th day of your cycle.
Step 5: The last fertile day is determined by subtracting 11 from the length of your longest cycle. If 32 days was your longest menstrual cycle, take 32 and subtract 11 to reach the number 21. This means that the last day of your fertility period ends on the 21st day of your cycle.
The time in between these two days is considered your fertility window. In the above example, your fertility period would be from the 8th day of your cycle to the 21st day of your cycle. Your ovulation is expected during this time frame. You cannot get pregnant everyday during this period, but it is sometime during this period that pregnancy can occur.