During this period, is vulnerable to penetration of sperm and hence fertilization.
The ovulation method with a calendar (sometimes known as the rhythm method) predicts that when a woman will ovulate by examining her menstrual history.
The ovulation calendar method allows a woman to keep track of her fertile period; the period is more likely to conceive.
Day one - first day of menstrual flow
To begin the calendar method of ovulation monitoring and prediction of ovulation, you should be aware of the key days in your cycle. The first day is the first day of your menstrual cycle. You will want to circle or highlight the date in your calendar. For each consecutive month, do not lose sight of the first day of your menstrual cycle and circle or highlight that day on your calendar. To identify trends, build a few months of these monthly cycles to know the total number of days in your shortest cycle and longer.
Calculation of fertile period
While the calendar method of ovulation is a good tool to predict the most likely time to conceive, as the statistics show, is not infallible. According to the Mayo Clinic, birth control calendar method is 87 percent effective. It means that a woman using the calendar method to prevent pregnancy has a 13% chance of becoming pregnant if only based on the calendar method of birth control. Due to alterations of the menstrual cycle, ovulation may not occur at the calculated date.
If your goal is to prevent pregnancy, ovulation method of the agenda is not precise enough to ensure they do not get pregnant if you have sex in and around the fertile period. On the other hand, if you're trying to get pregnant, there are other methods that can be used in conjunction with the calendar method of ovulation, as fertility table, fluctuations in body temperature, changes in saliva and prediction kits ovulation, combined with the timing of the ovulation method can increase your chances of conceiving.