Unintended pregnancy not only affects your work plan, upsets your life but also affects your family's happiness . And the simplest, most effective way of doing it is to use natural contraception, one of the most effective methods, without using any drugs or other means of support, that is, ovulation days to prevent pregnancy.
To ensure that no pregnancy is available, women should step back 3 days from the first day of pregnancy.
Similarly, subtract 11 periods from the longest day of the menstrual cycle. For example, the longest interval between menstrual periods is 30 days, 30 - 11 = 19 days. So the time of danger is calculated from the 8th to the 19th day of the menstrual cycle.
If women have more than 2 shorter or longer cycles then the standard date method will not work.
In short, if there is a gap between the longest and the shortest periods, 31 and 26 days, then the length of pregnancy is from the 8th to the 21st day . Except those days are your safe days.
To ensure that no pregnancy is available, women should step back 3 days from the first day of pregnancy. As the above example, the 8th day onwards is a dangerous day, then 3 days back is 8 - 3 = 5, women will abstain from the 5th day, the safety will be higher.
At the same time, it should also be added 3 days after the risk date at the end of the cycle. That is, from the 21st + 3 = 24 days, the contraception is higher.
This method only applies to women who have regular menstrual period from 26 to 32 days.
Accordingly, the first day of the menstrual cycle is calculated as the first day. The days are considered dangerous, avoiding intercourse is from 8-19.
The standard date method is applicable to women who have regular menstrual periods.