Safety period ≦ "the first seven and the last eight"
In the traditional concept of society, "the first seven and the last eight" is a safe period, which generally refers to the first day after menstrual cramps to the day before ovulation, usually 8 days, that is, the last 8 days. From the first day after ovulation to the day before the next menstrual cramp, it is usually 7 days, which is the first 7 days. During this period, the probability of pregnancy in the same room is smaller than at other times, but it is not absolutely risk-free. So the safety period ≦ "the first seven and the last eight"
Avoid the "ovulation period"
If you want to have sex safely to avoid pregnancy, then you must avoid the ovulation period. "Ovulation period" generally means that the ovulation date of women is usually about 14 days before the next menstrual period. After the ovum is discharged from the ovary, it can live in the fallopian tube for 1-2 days, waiting for fertilization. To be on the safe side, we call the first 5 days and the last 4 days *** 10 days together with the ovulation date as the ovulation period.
How to calculate the safety period:
Rhythm is related to everyone's longest cycle, shortest cycle and menstrual start time. Usually, it refers to the ovulation date from 1 day of the next menstrual period to 14 day or negative 14 day, and the ovulation date combined with the first 5 days and the last 4 days is called ovulation period. Except the menstrual period and ovulation period, the rest of the time is a safe period. You don't have to use any birth control pills and birth control pills during safe sexual intercourse.
It should be noted that the starting date and ovulation period of the next menstrual cramp can only be calculated by knowing the length of menstrual cycle, so it can only be applied to women with normal menstrual cycle.
Is the safety period absolutely reliable?
According to foreign statistics, the failure rate of using calendar method for contraception is 14.4%-47%. Therefore, this method is only suitable for people who have normal menstrual cycle, live together for a long time and can correctly grasp the calculation of safety period. For people with irregular menstrual cycles, couples visiting relatives and women with changed living environment, this method is not very reliable.
Matters needing attention in using safe period contraception:
1, disease.
Many diseases will affect women's ovulation time, such as endocrine diseases and kidney diseases. If both men and women adopt such contraceptive methods during this period, it is very likely that they will get pregnant unexpectedly.
Step 2 change contraceptive methods
If women switch from oral contraceptives to physiological contraception, extra ovulation or irregular menstruation may occur in the first few months after stopping taking contraceptives. Therefore, it is suggested that other contraceptive methods should be used in the first few months after drug withdrawal.
3. Age factor
If a woman is already in her menstrual period but finds herself bleeding outside, then this bleeding may be caused by ovulation. Therefore, you can sleep together on the fourth day after the bleeding stops.
In fact, neither "the first seven and the last eight" nor the safety period can be absolutely safe. After all, there are differences in personality, so using this contraceptive method often leads to unexpected pregnancy. Because the current clinical medical point of view believes that the time of ovulation of women is influenced by external environment, climate, personal emotions, health status and other factors, ovulation may be delayed or advanced, and extra ovulation may occur. In addition, without this understanding and knowledge, security is impossible.
"Before seven and after eight" is a method used to calculate the safety period, which refers to seven days before menstrual cramps and eight days after menstrual cramps. For most women whose menstrual cycle is 30 days, this is a relatively safe period, which means that if they share the same room during this period, the chances of pregnancy can be reduced.
First of all, let's understand what is the ovulation period of women and what is the safe period for female friends. Usually women have an opportunity to ovulate once a month, so this day is the ovulation day before the next menstruation of female friends. Add up the first 5 days and the last 4 days of the ovulation day, and this 10 day is the ovulation period of women. If the husband and wife are in the same room during this time,
A woman's month is divided into three cycles: menstrual period, ovulation period and safety period. Excluding menstrual period and ovulation period, the rest is the safety period, that is, from the first seven days of the public holiday 1 day to the eighth day after the public holiday.
This period of time is relatively in a safe period, and people usually call it the first seven and the last eight. During the safety period, if the husband and wife share the same room, the probability of pregnancy is very small, but this is only for those female friends with regular menstruation. For those female friends with irregular menstruation, there is some error in this calculation method.
The critical period, that is, ovulation, is also a period when pregnancy is relatively easy, and this period is 2~3 days before ovulation, and a few days after ovulation is a period of relatively high pregnancy. Eggs will live for 1 ~ 2 days in female friends, but sperm may live for 2~3 days, so it may be easier to get pregnant if husband and wife live together during this period.
We can use this time period to infer the critical period of female friends, that is, 5 days before ovulation and the day after ovulation plus ovulation, so 7 days is a dangerous period for female friends, but for those pregnant couples, it is also the best time to conceive. For those female friends with regular menstruation, it can be 9~ 15 days after menstruation is clean.
We might as well give an example. If you have your period 1 and your period ends on the 7th, you may enter the critical period 16, and ovulate 17, counting from 16 to 2 1, so it is easier.
Hello, I'm Dr. Liu Xuemei. I'm glad to answer this question for you. In fact, the first seven and the last eight we talk about are not scientific. This situation is only suitable for women with very regular menstrual cycles. The first seven and the last eight are seven days before menstruation and eight days after menstruation. If you say that you 15 menstruate, then it is said that 9: 00 to 15 is a safe period, which is the first 7! After 8 days, it means that you are safe for 8 days after menstruation! If your menstruation is normal, then the first seven and the last eight may be more accurate. If your menstruation is abnormal, then you should pay attention!
If a woman's menstrual cycle is regular, the week before menstruation is clean and the week before menstrual cramps is a safe period, during which ovulation will not occur, so most of her roommates will not get pregnant. However, between 12 day and the 20th day of menstruation, it is easy to get pregnant at this stage, so it is easy to get pregnant in the same room, which is a dangerous period. However, the ovulation period of female friends may be changed by many factors, such as staying up late, stress and mood swings. In general, safe period contraception is not advocated, because safe period contraception is sometimes unsafe. It is suggested that all women of childbearing age adopt reliable contraceptive methods, such as using condoms or short-acting contraceptives. These methods are simple, safe and reliable. As long as the method is properly mastered, unexpected pregnancy will not occur under normal circumstances. In addition, if you have long-term contraceptive requirements, you can also wear an contraceptive ring.
Protect yourself.
"First seven and then eight" refers to the first seven days before menstruation comes, and the eight days after menstruation is a safe period. In the case of normal menstruation, the principle of safe period contraception is: the closer to the first day of menstruation, the safer it is, and the farther it is, because the possibility of ovulation increases. This is a question of probability.
There is no absolute safety period for women. Ovulation period is different for everyone, some people will be early, some people will be late. The key to using safe period contraception is to determine the date of ovulation for women. When the ovary ovulates, there is generally no special feeling. Therefore, the success rate of this contraceptive method is not very high, please choose the contraceptive method that suits you as appropriate ~
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Not long ago, I talked to a friend about this problem. She didn't intend to have children, but this contraceptive method failed and she was pregnant. Everyone in the family wants it, and before she is ready, she is entangled in whether she wants this "unexpected baby". I also advised her that "since I'm here, it's fate, just let nature take its course."
"Before seven and after eight" is a method used to calculate the safety period, which refers to seven days before menstrual cramps and eight days after menstrual cramps. For most women whose menstrual cycle is 30 days, this is a relatively safe period, which means that if they share the same room during this period, the chances of pregnancy can be reduced.
For women with regular menstruation, the ovulation date is usually around 14 days before the next menstruation, from which the dangerous period and safe period can be deduced:
Ovulation period is 5 days before ovulation and 4 days after ovulation, with a total of *** 10 days called ovulation period, and the rest days are called safety period, that is, "the first seven and the last eight", from clean menstruation to the day before ovulation, and from ovulation to the next menstruation, that is, "the first seven".
Many couples will think that since this period is relatively safe, there is no need to use condoms. This "rhythm contraception" is not recommended!
Because if women have irregular menstruation, this time is not necessarily a safe period;
In addition, even with regular menstruation, ovulation will be affected by external factors, such as recent mood swings, changes in work and rest, and overwork. May lead to changes in ovulation period.
Then the failure rate of using "safe period contraception" in this way is very high, so if couples don't want children, this contraceptive method is not recommended.
On the whole, the "safety period" is not absolutely safe and can only be used as a reference. Especially for women with irregular menstruation, it is best to take necessary contraceptive measures, which is the safest.
What exactly do the first seven and the last eight of women's safety period mean? Speaking of the word "the first seven and the last eight", I believe many people will not be unfamiliar. Yes, it is what we usually call the basic algorithm of women's safety period. For many people, especially couples who know each other very well, it is their most common contraceptive method to calculate the safety period of women by the method of "the first seven and the last eight".
1, what are the first seven after eight?
First of all, the contraceptive measures of the first seven and the last eight are only relatively effective. The so-called relative, that is, in the "first seven after eight" specified time, the probability of pregnancy is smaller than other times, but it is not absolutely risk-free. Compared with taking medicine and using contraceptives, the risk of using this safe period contraception is still relatively high! Now give you a detailed introduction to the specific meaning of the safety period.
2. Do you really know the first seven and the last eight?
When it comes to the safe period, most people will probably associate this word with phrases such as "I won't get pregnant" and "the first seven and the last eight". What is the safety period?
When it comes to the safety period, we have to start from the first seven to the last eight. The "first seven and last eight" of women's safety period should be determined according to the menstrual cycle. The first seven days are seven days before menstruation and the last eight days are eight days after menstruation begins. It is generally believed that during the first seven to eight months, the probability of a woman getting pregnant is very low, and one time is called the safety period.
To make the safety period easier to understand, let me give you an example. If a woman starts menstruating from 1 65438+1 October 1, then the first seven days are seven days before165438+1October1,and the last eight days are from/kloc-0. Some women are prone to make mistakes when calculating the "last eight"-understanding "last eight" as the eighth day after menstruation. This method of calculating the safety period is wrong, and it is naturally easy to be "caught".
3. Are the first seven and the last eight really safe?
Many people have great trust in the safe period, thinking that as long as they correctly grasp the safe period, they will not get pregnant without taking contraceptive measures. So, is the safety period safe after all? "The safety period is very pit, and safety basically depends on RP!"
The so-called safety period is entirely based on the very good health of women. If I can't report for my period on time, or if women's health is not ideal, the safety period will soon become a cloud. Many diseases will change the ovulation time of women, such as endocrine diseases and kidney diseases. If you use "safe period" contraception during this period, it will often lead to contraceptive failure.
Although it is convenient and fast to calculate the safe period of women by the method of the first seven and the last eight, its disadvantage is low success rate. According to statistics, the effective rate of contraception in safe period is only 65% ~ 95% (the effective rate can only reach 95% under accurate prediction, and special training is needed to accurately predict ovulation). The effective rate changes greatly because women may ovulate at any time within one month, and the ovulation period is different in different months. Due to the changes of personal constitution, climate, diet, mood, environment and hormones in the body, ovulation often fluctuates and even extra ovulation occurs, so the contraceptive failure rate is high.
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"Honey, today is the safety period."
"Nani, is it impossible not to TT, to have a baby! Let's do something meaningful. "
If you think that you won't get pregnant during the safe period, you don't need to take measures, which is all wet. If no measures are taken, life may actually be created.
As we all know, the first seven and the last eight are a method to calculate the safety period. The period from the day when menstruation begins to the day before ovulation begins is the safe period before ovulation, usually 8 days, so it is the last 8 days. From the first day after ovulation to the day before the next menstruation, the safe period after ovulation is usually 7 days, so it is the first seven.
The so-called calculation of the first seven months and the last eight months of the safety period is not suitable for everyone. Generally speaking, if the menstruation is normal, it is not easy to get pregnant, but special circumstances are not excluded, because you don't know whether the menstruation next month is normal. It can only be said that the probability of pregnancy in the same room during the safe period is lower.
In particular, you are not allowed to menstruate at ordinary times. Don't believe in any safe period, and you must take measures. I just believed in the safety period so much that I overturned.
The prerequisite for calculating the safety period is menstrual regularity, with a period of 28-30 days. Seven days before menstruation and eight days after menstruation are basically safe. The first seven days and eight days 15 days after menstruation is a safe period.