Calendar method of contraception: how much can you trust it?
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If you are afraid of an unplanned pregnancy, don”t like condoms, and don”t want to take hormones, you can try the calendar method of contraception. This will help you calculate the safe number of days of unprotected intercourse, in which the chances of conception are minimal.
Contents of the article:
What is a calendar method of contraception?
The calendar method is based on the length of the menstrual cycle. To understand which days you are least likely to get pregnant, you need to know your cycle exactly. To do this, you must record the start and end dates of your periods for at least six months.
You can use a regular calendar, but now that everyone has a smartphone, it”s easy to download women-only apps that let you track your periods. Choose the method with which you are most comfortable working.
To understand the length of your cycle, count the number of days from the first day of your menstrual bleeding to the next day. This number shows how many days your cycle lasts. For an accurate calculation, it is necessary to collect data for at least six months, and preferably a year. This is due to the fact that cycles can change or get disrupted for various reasons.
If your cycle is shorter than 27 days, the calendar method of contraception will not suit you. In your case, ovulation may occur twice a month, and it is simply impossible to determine a safe day. If everything is normal, you can safely trust this method.
What days are considered safe?
Understanding which days are safe is very simple — you need to find the days when the likelihood of conceiving a child is highest. This period is called the fertile window. To install you need the following:
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- Based on your notes, determine the number of days in the shortest cycle in a year;
- Subtract the number 18 from the number of days in a short cycle;
- Calculate how many days you get and write down this number — it will be the day of your ovulation.
Example: If you have a short cycle of 25 days, subtract 18 to get 7. Look at a calendar and count 7 days from the start of your period. This number is the date you start ovulating. This date marks the beginning of your unsafe days, when you need to protect yourself.
Now that you know when your fertile period begins, the next step is to determine its end date.
Contraception (contraception): cervical cap, calendar method of contraception, and other methods
- Find your longest cycle of the year and count the number of days in it;
- Subtract 11 from this number;
- Calculate the number of days and determine the end of ovulation.
Example: Your longest cycle was 29 days; subtract 11 to get 18. Look at your cycle on a calendar and count 18 days from the first day of your period.
The date you see is the end of your fertile window. The next day, you can forget about using other contraceptive methods. These days are considered safe.
Can you trust the calendar method of contraception?
The calendar method is not considered a perfect guarantee of protection. It can only tell you which days are most or least likely to conceive. This makes it completely impossible to determine the start and end dates of ovulation. In particular, a woman”s cycle varies from month to month.
Therefore, if you want to protect yourself from unplanned pregnancy, you should combine it with other contraceptive methods. You can relax on safe days, but don”t forget condoms on unsafe days.
