In Mu Fushu's memory, the student days were quite interesting. Compared with the fact that she wore a mask to prepare for herself since she was a child, and the deceit after taking over the family business, the more than ten years of studying are still very commemorative.

The male and female students of Tianyi Academy attend classes in separate classes, and the dormitory is no longer a courtyard, but the dining hall for eating is together, but the female students have a private room.

Each cultural class has its own class, extracurricular activities are together, and there is only one martial arts arena in the racecourse, but fortunately, the time is staggered.

When the "visiting group" arrived in the morning, it was the second class. Whether intentionally or unintentionally, the classes that the visitors chose to attend were girls' classes.

Because of the "scientific management" method used, a class is three quarters of an hour long. They were about halfway through when they arrived, and the class happened to be a biology class.

The female students in this class ranged in age from thirteen to sixteen, and the biology class was different for men and women, and this class was mainly about women's menstruation and ovulation.

In Da Sui, these are carefully taught by the nurturing grandmother or female elders after the little lady's first menstruation, but unfortunately most of them talk about not touching cold water and paying attention to keeping warm, etc., and there is no mention of how menstruation is formed and ovulation and the like.

The class was taught by a female master. About the first time she took this class, she had already finished talking about the precautions for women's menstruation, and then she was going to talk about the ovulation period with a relatively large scale, plus someone listened to the class, the female husband actually blushed, and the class also talked about the stammering period Ai Ai.

Mu Fushu handed Ah Zhao to Ayi Pasha, asked her to take her out to play for a while, and walked to the lecture hall by herself. The master naturally knew her, and gave her a salute in a panic, Mu Fushu motioned for her to go to the stage, turned around and took a white chalk and wrote a few big words on the blackboard: female ovulation period.

The female students below all looked red: they naturally saw these things in the textbook, but many things are not just read and understood! I could only look shy and timid, lower my eyes and prick up my ears to listen to the lecture.

Mu Fushu glanced at them and sighed in his heart. These girls all have good family backgrounds and have not yet decided on a relationship, and they may come here to take classes because they are really for learning knowledge, but more for having a good family in the future. In general, the parents of these people are very far-sighted and ambitious.

Mu Fushu's identity is known to several little ladies, including Wen Jiamin, the little lady of the Wen family. She looked at Mu Fushu with dripping eyes, with an excited look.

Mu Fushu's fingers lightly buckled on the table, and said, "Everyone has read the book in advance and knows what ovulation is." ”

The little ladies nodded shyly and timidly, not daring to look back at the large group of people behind them. Mu Fushu said with a smile: "Don't be shy, these things are closely related to your body, and it has more to do with your future marriage and children, if you don't learn this course well, you won't be able to give birth to a son in the future, don't blame Mr. for not teaching well." ”

Throughout the ages, the succession of ancestors is a major event, Mu Fushu said this, not only the little ladies are sitting in danger, but the listening group behind them is also serious.

Mu Fushu paused slightly, and said: "After a woman comes to Tianqi for the first time, she will discharge a mature egg every month, and after the egg is discharged, it will enter the fallopian tube, and it can generally survive for 1-2 days, while the ** produced by the man is continuous. **Usually it remains active in the female body for 2-3 days, and its ability to conceive is about 4 days. If you want to get pregnant, you need to have sex with your husband before and after ovulation, and as long as both parties are healthy, you may be able to get pregnant. ”

As soon as these words came out, there was silence below. Mu Fushu nodded with satisfaction, and continued: "Everyone must be curious to know when the ovulation period is, the book says that it is about seven days between each menstrual period. Here I will teach you a more complicated but accurate method. ”

Everyone listened more attentively.

"The first day of ovulation is equivalent to the number of days of the shortest menstrual cycle minus 18 days, and the last day of ovulation is the number of days of the longest menstrual cycle minus 11 days.

Before using this method to calculate, you should observe and record your menstrual cycle at least eight times in a row to get the longest and shortest days of your menstrual cycle, and the numbers obtained by substituting the above formula represent the beginning and end of the woman's "ovulation period" respectively. ”

After speaking, Mu Fushu wrote on the blackboard: The calculation of the menstrual cycle is from the first day of this menstrual cramp to the first day of the next menstrual cramp. For example, the menstrual cycle of a woman of childbearing age in the first eight months is the longest is 30 days, and the shortest is 28 days, and the substitution formula is:

The first day of ovulation is equal to twenty-eight days, minus eighteen days is equal to ten days, and the last day of ovulation is thirty days minus eleven days is equal to nineteen days.

Writing this, Mu Fushu turned around and found that the little ladies below were struggling to copy the words on the blackboard, and although the messengers listening to the class below were all men, they were also reciting silently......

Mu Fushu smiled slightly. It seems that the major event concerning the birth of a son is equally valued by both men and women.

I wrote so clearly that you should understand that this woman's "ovulation period" begins on the 10th day of the current menstrual period and ends on the 19th day of the current menstrual period. That is, her ovulation period is a total of nine days, not seven as stated in the book.

If you observe that your menstrual period is once every 28 days, then you can set the maximum number of days and the shortest number of days of your menstrual cycle at 20 days, and substitute the formula to calculate your "ovulation period" as: the 10th to 17th days of the current menstrual period. The seven-day ovulation period mentioned in the book is correct. This method of calculation is based on the first day of the current menstrual period and counts the number of days backwards, rather than the next menstrual cramp as the base point, so it is not easy to make mistakes. If you want to get pregnant after finding out the "ovulation period", you can start from the first day of the "ovulation period" and have intercourse every one or two days for several months, which is very likely to be pregnant. ”

There is also a sentence in the back, "If you don't want to get pregnant, you have to miss the "ovulation period" Mu Fushu didn't say, thinking that married women in this era are willing to have children, if the latter sentence is said, others will think that she is teaching bad children......

The content of this class is actually very private, in this era, before the wedding, the nurturing grandmother or mother and sister will secretly inform the bride, but Mu Fushu is standing on the podium here to teach openly, everyone feels very open, and there are no dirty thoughts at all.

Wen Jiamin was even more bold, she actually raised her hand and asked: "Then why did the third sister-in-law say that it is easy to get pregnant seven days after the menstrual period?" She's still a doctor at home! ”

Mu Fushu smiled and nodded at her: "Jia Min is really a studious little lady. ”

Wen Jiamin blushed and said, "Hmm...... Actually, it was my aunt who was the third sister-in-law and I accidentally heard her ......"

Mu Fu bared his teeth at her: "Well, I didn't say anything!" ”

Wen Jiamin's face turned even redder, but his eyes were shining.

Mu Fushu continued: "Since I have said this, I will say one more thing: many people think that seven days after the menstrual period is the easiest to get pregnant, but in fact, it is not necessarily the case, it depends on everyone's respective menstrual cycle, which I have said very clearly." Another point is that the issue of having children that everyone is most concerned about is actually the most critical one for Lang Jun. ”

As soon as these words came out, everyone chattered below, and it was not the female students who made the most trouble, but the messengers. Since it is the envoy of the Great Sui, it must be the language of the Great Sui, Mu Fushu said this, some of them were very interested, some did not agree, and some actually borrowed paper and pen from those little ladies to prepare records.

Mu Fushu slammed the table a few times with a stern expression, and said: "Everyone knows that without men, women can't give birth to children at all, let me make an analogy, men have seeds, and women have fertile fields." Seeds are naturally produced when they are planted in fertile fields, and what is produced depends on the seeds. ”

It was impossible for her to explain to them that there are 23 pairs (46) of chromosomes in human somatic cells, one of which is a sex chromosome and 22 are autosomes. Sex chromosomes are the deciding different. The sex chromosomes of females are XX, and the sex chromosomes of males are XY. Germ cells have only 23 chromosomes due to meiosis, so females can only produce one egg with sex chromosome X, while males can produce two types of eggs, one with sex chromosome X and the other with sex chromosome Y. When the egg is combined with **, if the egg is combined with ** containing sex chromosome X, the fertilized egg is XX type and develops into a female fetus. If the egg is combined with ** containing the sex chromosome Y, the fertilized egg is XY type and develops into a male fetus. According to the reasons analyzed above, it is proved that the birth of a boy and a girl is related to sex chromosomes, and if **Y does not participate in conception, he will not be able to give birth to a boy, so do not blame the woman for not giving birth to a boy, and of course do not blame the man.

After she described it in the simplest language, she threw out a partial room: "If you want to control zhì to have children and daughters, it is not impossible, but it is not very effective, and there are six or seven points." ”

After saying that, she "contributed" the methods that her best friend had tried and succeeded in her previous life, in fact, when the woman's body is alkaline, there is a good chance of giving birth to a boy, and if it is acidic, there is a good chance of giving birth to a girl. Intercourse on the night of the peak of ovulation, that is, when the follicle is about to burst, has a good chance of conceiving a boy. If you want a boy, you can soak a small amount of baking soda powder in water on the night when the follicle is about to burst, and the woman will soak her lower body for about half an hour, and if you want a girl, soak it in vinegar for half an hour.

The tone of this lesson is high and low, and the tide is repeated, which simply refreshes the outlook on life and worldview of these natives, and it is strange that no one doubts what she said, in the eyes of people in the Great Sui and surrounding countries, this legendary queen mother is about the same as a half-immortal.

After the class, the little ladies were going to the piano room to take lessons, the messengers looked at Mu Fushu with extremely awe-inspiring eyes, Yang Xiao actually asked with a shy face: "Queen Mother, I have only heard of 'few desires and more men' before, is it true or false according to what Niangniang has seen?" ”

Mu Fu was stunned for a moment, and chuckled: "There is also a certain truth, husband and wife Dunlun is a human affair, moderate is good for physical and mental health, but excessive is not good for the body, and naturally affects the seed ......."

San Lang hugged Ah Zhao, who felt bored and returned, and looked at Mu Fushu with a speechless and choked expression: What kind of trouble is this? For Mao's eldest mother, she actually became an infertility expert in the blink of an eye...... With so many people surrounding her, can't she give birth to a son? R1152