With the opening of the second child policy, more and more people put the plan of having a second child on the agenda, hoping that having a second child can make a good word.
Some want daughters, others want boys. For those families who have the idea of "son preference", they are always thinking about having a son.
So, who decided to have boys and girls?
Everyone has different opinions on this issue.
As we all know, men can produce two kinds of sperm: one contains X chromosome and the other contains Y chromosome; On the other hand, women can only produce eggs with X chromosomes.
In the process of fertilization, if an egg is combined with sperm containing X chromosome, it is a girl; If an egg is combined with sperm containing Y chromosome, it is a boy.
So, if you have to be true to the sex of the fetus, go find a man. After all, men will have X and Y sperm.
Don't throw the pot of giving birth to boys and girls on women's heads again!
However, the combination of sperm and egg is a very complicated process, which depends not only on the quantity and quality of male X and Y sperm, but also on the microenvironment of female vagina and the best time for eggs and sperm to meet.
That is to say, sperm must break through the tight encirclement, just meet their dream lover waiting for him, in order to generate the crystallization of love.
Can you have a son by building a female alkaline constitution?
There is a folk saying that the acid-resistant environment and alkaline environment of X sperm are beneficial to the survival of Y sperm.
Therefore, washing the vagina with alkaline liquid (such as soda water), or drinking lemonade and soda water to create an alkaline constitution for women will be more conducive to attracting Y sperm and greatly improve the probability of giving birth to boys.
Is there any scientific basis for this theory? End! All of them! Don't! Yes!
As early as 1970s, some researchers had done animal experiments, washing and soaking two kinds of sperm with acidic and alkaline solutions respectively. The results showed that there was no significant difference between the motility of X sperm and Y sperm in acidic and alkaline environments.
Secondly, there is no so-called "acid-base constitution" in medicine. Under normal circumstances, the acidity and alkalinity of human tissues, organs and blood are relatively stable.
Drinking alkaline water and eating alkaline food can only change the pH of urine, and will not make people "alkaline or acidic".
Can the Qing palace map predict the birth of boys and girls?
About the map of the Qing dynasty, the internet is very mysterious. It is said that it was handed down from the Qing Dynasty, and it was calculated according to the five lines of gossip formula of Yin and Yang in Zhouyi.
The prediction object of the Qing Palace map is mainly women, which is mainly calculated according to women's age and pregnancy month.
At first glance, this picture is quite advanced, which seems to be the same thing. However, if you count carefully, you will find that the ratio of boys to girls is 1: 1, which is nonsense.
In fact, the authenticity of this Qing palace watch cannot be verified, and there is no scientific basis. At best, it is a statistical table, which also reflects from the side that it is a probability problem to have boys and girls.
Using this method to predict the birth of boys and girls is basically similar to throwing dice. It is either right or wrong. Just watch and don't take it seriously.
Can all kinds of combination postures decide to have boys and girls?
It is circulated on the Internet that if you want to have a boy, you have to "go deep" and if you want to have a girl, you have to "go shallow" to shorten the distance and reduce the probability of Y sperm being killed in a long journey.
It sounds reasonable, but in fact, no matter which posture is used, the number of Y sperm and X sperm is almost the same in the end, and the combination of the two sperm and eggs is completely random, which is why there is no imbalance between men and women.
Can "fetal medicine" guarantee the birth of a son?
Although we have been emphasizing equality between men and women, some people still have a serious "son preference" idea, and in order to ensure the birth of sons, they will not hesitate to take so-called "fertility drugs".
The culture of traditional Chinese medicine is profound, but after searching all kinds of documents, there is never a so-called formula that can be used to "reincarnate".
The so-called "fetal medicine" can not only transfer the fetus, but also may cause fetal development disorder or fetal malformation, and even death!
In addition to some nonsense about boys and girls, there are also some methods to identify the sex of the fetus, such as "pointed men and round women", "ugly men and beautiful women" and "sour women".