This term refers to changing the body's pH level by the acidity or alkalinity of food in order to achieve the goal of having a boy or a girl.

Women's vaginas are generally acidic, and if alkaline substances are secreted during orgasm, it is more suitable for the survival of Y sperm, so those who want to give birth to a boy must pay attention to this; those who want to give birth to a girl should maintain an acidic environment in their bodies. Dietary control is to classify food into acidic, alkaline and neutral, men eat more acidic food, women eat alkaline food, can help to give birth to a boy; while men eat more alkaline food, women eat more acidic food, will be more favorable to the birth of a girl.

Acidic foods

Milk, eggs, fish, meat (e.g., beef, chicken, pork, fish)

Acidic fruits (e.g., tomatoes, oranges, strawberries, grapes, pineapples, apples)

Hoping for a boy: men should eat acidic foods

Hoping for a girl: women should eat acidic foods

Alkaline foods

Legumes (e.g., green beans, soybeans, red beans, tofu)

Bok choy, romaine lettuce, potatoes, bamboo shoots, onions, shiitake mushrooms, cauliflower, kelp

Fruits (bananas, watermelon, loquats)

Wheat flour products, milk, tea

Hoping to have a boy: alkaline foods for women

Hoping to have a girl: alkaline foods for men

Hoping to have a girl: alkaline foods for men Alkaline foods

Neutral foods

Seafood (e.g., shrimp, conch, clams, oysters, octopus, squid)

Daikon radish, kohlrabi, green onions, peas

Cocoa, chocolate

Extended reading - pregnant women's diets How to reasonably match? Healthy pregnancy: vitamins vs pregnant women Key substances for fetal brain development

Steps to have a boy

Time of intercourse - abstinence (about 5 days of time) until the day before ovulation to have intercourse, before you can still have normal sex, because the cervix is alkaline during the period of ovulation, which is conducive to the survival of Y spermatozoa.

Vaginal pH regulation - try to have intercourse as close to ovulation as possible, as the woman's secretions are alkaline during this time, which can help Y sperm to move around; or start douching the vagina with soda three days before the day of ovulation to enhance the alkaline environment of the vagina.

The position of coitus - it is said that when coitus should make the woman reach orgasm, it is more likely to have a boy, because when the woman orgasms, the cervix secretes more alkaline secretion, which is suitable for Y sperm activity, so the man should caress the woman more beforehand. In addition, the combination of deeper insertion should be used, because the Y sperm is less active in the inner vagina, if the Y sperm closer to the cervix to ejaculate, can: ① to reduce the sperm breakthrough distance; ② insertion of deeper, the woman is more likely to have an orgasm. You can try: normal position, curved position, back position, front seat position If you want to have a boy, please quit smoking

Boys beneficial food

Cordyceps Duck Soup

Materials and seasoning: duck half, Cordyceps sinensis 2 money, 1 tsp. of salt

Preparation: ① Duck chopped, washed, hot, and fished up. ② Cordyceps sinensis rinse, and duck pieces together into the stew pot, then add 6 bowls of water. ③ will step ② to high heat boil, and then turn to low heat stew until the duck meat cooked, and finally add salt to seasoning off the fire.

Functions: ①Strengthen yang and tonify essence, replenish physical strength. Suitable for men who are weak, lack of vitality and want to give birth to a man, as well as the waist is often sore and numb, cold. ② Cordyceps is a nourishing lungs and kidneys to help the yang good

Red Chicken

Materials and seasoning: chicken thighs 2, 2 tablespoons of red chicken, 1 section of ginger, cotton thread (or sewing thread can also be) 2, 2 tablespoons of soy sauce, 1 tablespoon of sugar

Preparation:

1) Ginger, clean, sliced; chicken thighs, pick the bones, washed, wiped dry and tied with a cotton thread bundle rolled and tied tightly.

②Start a frying pan, under the ginger slices burst incense, then under the red lees fried crisp.

3) Combine all ingredients of steps ① and ② in a pot, add 1/2 bowl of water and seasonings, and cook until the chicken is cooked to taste, then remove from heat. ④Wait until it cools down, take out the chicken, remove the cotton threads and slice it, then pour the sauce over it.

Functions:

①Nourishes qi and benefits the kidneys, helping to give birth to a male. Those with frequent itching and rashes on the hearts of the hands and feet are advised to take more.

②Red Bad Chicken, activate blood and benefit the liver and kidney.

The birth of a boy or a girl has always been one of the most important concerns of people, and many people hope to have a boy or a girl according to their own wishes. Because of the influence of feudalism, some people still think that only a boy can pass on, so, the daughter-in-law had a boy, will be doubly favored; otherwise, they will be mother-in-law, her husband's eyes, became "angry". In fact, this is unreasonable and unscientific.

Ancient medicine has long put forward many theories to determine the sex of the fetus, but unfortunately limited to the level of understanding at that time are not established. Such as the Daozang Jing that after menstruation on a single day of conception is the yang for male, even day conception is the yin into female; Li Dongyuan that after menstruation one or two days after the sense of the male, four or five days of the sense of the female; Zhu Danxi to the left uterus for the male, the right uterus in the air for the female; Sheng Ji Fang to the left side of the movement for the male, the right side of the movement for the female; Chu's medical books to the blood wrapped in the blood of the male, the essence wrapped in the blood of the female. Conflicting theories also appeared in the history of Western medicine, such as some people have proposed that the right testicle is responsible for the birth of children, the left testicle is responsible for the birth of women; sperm into the right fallopian tube to get a child, into the left side of the female. Later, people noticed that only one side of the testicles or the removal of one side of the fallopian tube may have both children, which disproved these ridiculous theories. Until 200 years ago, there were still gaps in the theories of sexual differentiation. It was only when the Dutchman Antoine Leverhulk first saw sperm under a microscope in 1677, and 150 years later when the German B?r first saw a mammalian egg, that the ancient myths about conception were replaced by scientific mysteries.

The secret of childbearing was unveiled in 1902 by the American McClurg, who discovered the gender-determining chromosomes X and Y.

The birth of a boy or a girl is not determined by the woman, but mainly by the sex chromosomes of the man. Sex chromosomes, as the name suggests, are the chromosomes that determine gender. Human germ cells, there are 23 pairs of 46 chromosomes, of which 22 pairs of autosomes, 1 pair of sex chromosomes, female sex chromosomes for XX, the genotype can be 46, XX said; male sex chromosome for XY, the genotype is 46, XY. germ cells to go through two meiosis, 23 pairs of chromosomes into 23, the egg contains sex chromosomes only X a kind of sperm can be respectively, containing X or Y sex chromosomes. The egg contains only one sex chromosome, X, while the sperm can contain either X or Y sex chromosomes. When the sperm combines with the egg, the chromosomes of the fertilized egg revert to 23 pairs. If the sperm containing X chromosome combines with the egg, the fertilized egg is XX type and develops into a female fetus; if the sperm containing Y chromosome combines with the egg, the fertilized egg is XY type and develops into a male fetus. Therefore, the birth of a boy or a girl depends on whether it is X or Y sperm that participates in fertilization. And the combination of sperm and egg is random, is not subject to people's will, so as to maintain the general balance of the ratio of the sexes of human beings, which is also a kind of ecological balance of nature, this balance must not be destroyed, or else, will inevitably lead to unimaginable social problems.

The discovery of the X and Y sex chromosomes enabled people to begin to have a correct understanding of sex determination, and in the 20s and 50s, people had a further understanding of this, and it was generally believed that the Y chromosome is the determining factor in the birth of a child. It is believed that there is a male determinant on the X chromosome, which, when affected by a component of the Y chromosome, promotes the development of the undifferentiated medulla of the gonads towards the testes, while the cortex degenerates. In the absence of the Y chromosome in the nucleus, the cortex of the gonad develops into the ovary and the medulla degenerates. In recent years, a glycoprotein linked to the Y chromosome, the histocompatibility antigen, also known as the H-Y antigen, has been identified. It is hypothesized that it combines with related genetic factors on the X chromosome to contribute to the differentiation of the primitive gonads to the testes. But this theory does not indicate whether it is one or more genes that determine the sex of the fetus.

On December 24, 1987, the Institute of Biological Studies at the University of Cambridge, England, announced their new discovery that the sex of a fetus is determined by a gene called TdF. David Page, a geneticist at the institute, has been studying the sex chromosomes of people with repatriation transmissions since 1981. The males among the patients carried two X chromosomes, while the females had one X and one Y chromosome. Genetic analysis of the DNA of these patients revealed that in the vast majority of XX males there was a DNA-binding protein, commonly known as TdF, which could not hybridize with the DNA of XY females, and so scientists believe that it is the ectopic or deletion of that gene, called testicular determinant factor (TdF), that causes the perversion of the genetic sex between the sexes and the phenotype, known as XX sex. Patients with XX genetic sex contain TdF and therefore differentiate into the male phenotype, while patients with XY genetic sex do not have TdF and therefore differentiate into the female phenotype. Therefore, the male and female sex of the fetus is determined by the TdF gene. This research result is undoubtedly of epoch-making significance. It provides a theoretical basis for gene therapy when human beings need to exercise gender control in the future. However, the sex-determining factor is still not fully understood, and further research is needed.

Preliminary tests completed in the United States in recent years have shown that injecting testosterone into ewes can change the sex of the sheep embryo, but according to current knowledge and the above findings in Cambridge, England, the birth of a child does not depend on reproductive hormones but on the chromosome grouping of the fertilized egg. If the American experiment is successful, it will not only have practical value, but also be a new breakthrough in the theory of embryo differentiation. Whether it is right or wrong remains to be tested by time.

The in vitro fertilization research group at the University of Edinburgh in Britain and another medical research group have successfully used commercially available DNA probes to identify the male Y chromosome in embryos 4-8 days after fertilization. They believe that this method can be used for sex determination of in vitro fertilized embryos or normal pregnancy embryos obtained by uterine flushing, as well as for prenatal diagnosis of sex-linked genetic diseases. At present, this technique still needs to be refined and improved so that a cell can be removed for sex determination before cryopreservation of the embryo and so that the embryo remains undamaged for later implantation in the mother's uterus. Transgenic animal research also offers another possible prospect for sex determination. Scientists have introduced the bovine growth hormone gene into the male prokaryotic nucleus of a fertilized egg of a small animal. When the male and female prokaryotic nuclei fuse and the fertilized egg continues to divide, it can develop into a super critter, which carries the foreign gene. The revelation was whether transgenic methods could be used to correct human genetic diseases or to control or change the sex of embryos, or at least to overcome sex-linked diseases. Although this kind of experimental research can't be carried out further because of ethical and moral issues, it is undeniable that it also has a progressive, scientific side that can give some kind of enlightenment.

Developments in domestic medical research have made it possible to recognize the sex of the fetus in early pregnancy. Such as 40-60 days of pregnancy, sucking chorionic villus cells; after 3-4 months of pregnancy, amniotic fluid is extracted by amniocentesis, and after special cell culture and staining, its chromosomes are observed under the microscope, and it is possible to distinguish between male and female. It should be emphasized here that the purpose of establishing these methods is not to cater to people's desire to have boys and girls, but rather for the sake of eugenics. Because some genetic diseases are related to the sex of the offspring, such as hemophilia, pseudohypertrophic progressive muscular dystrophy and other diseases are transmitted only to boys, if it is known that there is such a genetic disease in a certain family line, then the family members should do prenatal diagnosis when they get pregnant, such as a boy, then immediately stop the pregnancy, so as to avoid the birth of the affected child to the burden of the family and the community, in order to ensure that every family can give birth to a smart and lovely children.