So, first of all, it should be noted that any similar method of contraception is not 100% effective. Someone can, scare, but the fact has long been confirmed by everyone.
Everybody has known for a long time that it is possible to become pregnant or not to become pregnant only on certain days. The ability of fertilization and conception depends on the viability of spermatozoa and the egg. In healthy women and girls, ovulation occurs in the middle of the menstrual cycle. Doctors determined that between the time of onset of ovulation and the subsequent menstrual cycle, there is a relationship, and quite a constant.
Calculate the "not dangerous" days can be, given the following points:
- 10-18 days before the first day of subsequent menstruation, the process of ovulation takes place;
- the egg is viable for 24 hours, more precisely 24 hours;
- the viability of spermatozoa is maintained for 48-72 hours.
The main points are revealed and now, based on them, you can calculate days in which you can not protect yourself. There are three methods for this.
Method one.
The first method of how to calculate days in which one can not be protected is also called calendar. The essence of it is to track the duration of the last 6-12 menstrual cycles. Of these, the longest and shortest should be tracked. As an example, you can consider the duration of a short menstrual cycle - 26 days, and a long - 31 days. And with the help of fairly simple actions, we expect "not dangerous" days. To do this: 26-18 = 8 and 31-10 = 21. After the calculations, we can say that the days in which you can not protect yourself are all up to the 8th, and after the 21st. The rest of the days have the opportunity to become pregnant.
The second method.
As the second method of calculating the days in which you can not be protected, called temperature. The name speaks for itself. The meaning of this method is to measure basal temperature for at least the last three menstrual cycles. There are several criteria for correct and more accurate recording of basal body temperature:
- measurements must occur every day at exactly the same time, in the morning hours;
- the thermometer, which measures the basal body temperature, must always be the same;
- make measurements immediately after waking up, not in any way without getting up from the bed;
- measurements are carried out rectally for 5 minutes, and the data should be immediately recorded.
After all the necessary data are collected, it is fashionable to build a graph on them. If a woman or girl has a normal menstrual cycle, the graph will look like a two-phase curve. At the same time in the middle of the cycle it will be possible to trace an insignificant increase in the basal body temperature, from about 0.3-0.6ยบ. When the moment of ovulation occurs, the basal temperature drops by a few tenths of a degree. On the graph this will be noticeable immediately, because a prong is formed, directed downwards.
As already mentioned above, the graph consists of a two-phase curve. The phase with the lowest basal temperature is called hypothermic, and the phase with the highest temperature level is hyperthermic. When menstruation begins, the curve changes, moving from the hyperthermic to the hypothermic phase. At each girl the rate of rise of a curve is absolutely individual. It can occur quickly within 48 hours or vice versa more slowly. The number of days in which the basal temperature curve rises can be 3 or 4. Also, in some, a stepped pattern is observed.
At the time when ovulation occurs, the transition from hypothermic to hyperthermic phase occurs. So, based on the plot, for 4-6 months it is necessary to determine the peak point of the basal temperature. For example, this peak point corresponds to the 10th day of the menstrual cycle. Further, to determine the boundaries of the abstinence period, the following calculations must be made: 10-6 = 4 and 10 + 4 = 14. From this it follows that the segment of the cycle obtained after the calculations, that is, from the 4th to the 14th, is the most "dangerous", and therefore, before and after the calculated days, one can not be protected.
It is proved that the effectiveness of this method is quite high. But always take into account that any temperature changes associated with illness or fatigue can adversely affect the construction of the graph and, accordingly, the correct curve. Also, you should not use this method for women and girls taking any hormonal drugs.
The third method.
The third method in medicine is called cervical. It consists in changing the amount of mucus secreted from the genital tract during ovulation.
Allocations do not happen at all or they are quite insignificant when the woman is completely healthy from the 18th day of the cycle and before the onset of menstruation, and also from the 6th to the 10th day.
Slime, like a raw egg yolk, stands out from the 10th to the 18th day.
Viscous and thick mucus immediately becomes noticeable, and its appearance indicates the onset of the ovulation process. A woman or girl can sense the moment of ovulation. Just enough to track the sensations of "dryness" and "humidity" in the genital tract.
The moment of ovulation corresponds to the peak secretion. Simply put, the allocation becomes transparent, watery and easily expandable. After the appearance of such mucus, after 3 or 4 days you can not protect yourself.
For those women who have vaginal and cervical disease, this method is not recommended.
So, of course these are the three most common methods to calculate days in which you can not be protected. But, again, not one of the methods does not give one hundred percent guarantee. Therefore, before using them, you should definitely get advice from a specialist.