Getting to know the times and dates of your ovulation cycle will help you to understand what time of the month holds the best chance of becoming pregnant.
Women generally have a 28-day menstruation cycle and ovulation usually occurs around 2 weeks before menstruation, on or around the 14th day of the cycle. This should help you to calculate the exact time of ovulation. However, this technique for calculation can only be used by women who have regular menstruation cycles. For example, when menstruation occurs every 28th day, ovulation will occur on every 14th day of this cycle (counting the first day of menstruation as the first day of the cycle).
For those women whose menstruation cycles are not so regular or cannot be easily calculated, the day of ovulation may be subject to change but there are some methods which can be used to help you work out when you will be ovulating. This can be done by recording the length of your menstruation cycle each month for a period of between 8–12 months, with each cycle beginning on the first day of your period and ending on the day before your period begins again. Then, analyze these records to find out which cycle was the shortest and which one was longest before taking these figures and using them to calculate the following:
- First fertile day = Number of days in the shortest cycle – 18.
- Last fertile day = Number of days in the longest cycle – 11.
Supposing that you recorded your cycles for 12 months and your results were 26, 24, 25, 28, 26, 27, 28, 27, 29, 30, 28 and 26, you would see that the shortest cycle was 24 days and the longest 30 days. When calculating as above, you would find that the first fertile day was 24 – 18 = 6, and that the last fertile day would be 30 – 11 = 19. Thus, the best time to engage in sexual intercourse for the highest chances of becoming pregnant would be between the 6th and 19th day of your cycle, being sure to count the days of your own menstruation cycle, rather than using the dates of a calendar.