1.What are the determinants of male and female? Each cell in the human body has 23 pairs of chromosomes that carry genetic material, 22 pairs of which are autosomes and one pair of which is a sex chromosome that determines the sex of the fetus. 23 pairs of chromosomes contain all the genes that are genetic information. In males, one pair of sex chromosomes is XY. During reproduction, the sex chromosomes undergo meiosis and the mature sperm after division, one containing X sex chromosomes is called X sperm and the other containing Y sex chromosomes is called Y sperm. In females, 1 pair of sex chromosomes is XX, so the eggs that mature after division all contain 1 X sex chromosome. If an X sperm and an egg combine, the pair of sex chromosomes in the fertilized egg will be XX and the fetus will develop as a female; if a Y sperm and an egg combine, the pair of sex chromosomes in the fertilized egg will be XY and the fetus will develop as a male. It is clear that the sex of a child is determined by whether the male sperm carries an X or a Y sex chromosome, independent of the egg. The sex of the child is determined at the moment of fertilization, and both men and women can influence whether Y sperm unites with the egg or X sperm unites with the egg. 2. What are the characteristics of Y sperm and X sperm? X and Y sperm have their own characteristics. X sperm has a larger head and larger volume, moves slower than Y sperm, is more tolerant of acidity and penetrates cervical mucus better than Y sperm, and has a longer life span. Y sperm has a small, round head and smaller volume, moves faster than X sperm, but is less tolerant of acidity and penetrates cervical mucus, but penetrates better in an alkaline environment and has a shorter life span. This is the physiological basis of some so-called methods of having male children. 3.What are the regulation methods for having male children? Although there is a determining factor for the birth of a male child, as if man cannot interfere, in fact, due to the different physiological characteristics of Y sperm and X sperm, the environment of fertilization will still have some influence on Y sperm and X sperm, which may affect the sex of the fetus. Theoretically, according to the characteristics of Y sperm and X sperm, some people have proposed the following methods to regulate the birth of male and female: (1) according to the orgasm regulation. The vagina is generally acidic, and when a woman reaches orgasm, she produces a large amount of uterine and cervical secretions, which are mucus-based secretions that are alkaline. So when a woman ejaculates when she reaches orgasm, a larger number of Y sperm will have a better chance of entering the uterus and fallopian tubes, and the chances of having a boy will be greater. On the contrary, if the man ejaculates before the woman reaches orgasm, more X sperm will have a better chance of entering the uterus and fallopian tubes, and the chances of having a girl will be higher. (2) Adjust the pH level in the body: If you want to have a boy, you should keep your body fluids alkaline and consume more alkaline foods, such as red beans, radish, apple, kale, onion, tofu, soybeans, carrots, tomatoes, bananas, oranges, strawberries, dried plums, lemons, spinach, grapes, tea, kelp, etc. If you want to have a girl, you should slightly acidify your body fluids and eat more acidic foods on a daily basis, such as various common meat and fish (ham, bacon, chicken, tuna, pork, eel, beef, horse meat, clams, octopus, loach, etc.), and others such as: egg yolk, cheese, pastry made of white sugar or persimmons, rice, peanuts, beer, fried tofu, seaweed, etc. It should be noted that although the pH level in the body is regulated, it is not yet known how much effect it has on the pH level of the vagina and uterus. (3) Mastering the depth of sexual intercourse: If the ejaculation position is shallow, the semen will be easily neutralized by the vaginal peg secretions, and the forward speed of Y sperm may be affected while X sperm will run faster, and the chances of having a girl will be greater. On the contrary, the position of the ejaculation is deep, the Y sperm can easily pass through the alkaline cervical secretion earlier than the X sperm, easy to have a boy. If you want to have a boy, shoot semen to the deep part of the vagina during sexual intercourse, this will help Y sperm to be the first to appear in the fallopian tube, avoiding the difficulty of its long journey through the vaginal secretions; if you want to have a girl, shoot semen to the shallow part of the vagina, intentionally increasing the difficulty of Y sperm to cross the long distance, so that X sperm will be far ahead of the others and will be able to combine with the egg first. (4) Mastering the time of sexual intercourse: after ovulation, the egg and other sperm, as Y sperm run fast, the chances of having a male are greater. The first thing you need to do is to have sex with the sperm before ovulation, because X sperm is more tolerant than Y sperm and has a longer life span. The above methods of regulating the birth of boys and girls make sense in theory, but the human body is a very complex organism, the process of conception is a very subtle process, whether the sex of the fertilized egg can be influenced by changing the external environment of the reproductive system, there is no definitive conclusion. 4.What are the regulation methods of male and female births in ancient medical books? According to ancient medical records, it is generally believed that a male is born when Yang energy is strong and a female is born when Yin energy is strong. For example, Wu Qian of the Qing Dynasty said in “The Essentials of Gynecology”: “Yang flourishes in the dry path to become male, and Yin flourishes in the Kun path to become female.” However, there are different interpretations of what is Yang Sheng and what is Yin Sheng. For example, the Qing dynasty’s Wang Puzhai’s “The Method of Obstetrics and Gynecology” says: “After midnight, when the child is delivered, the yang part of the seed is definitely a male child. And the couple sleep until midnight, both warm, and blood and uniform. When they have intercourse at this time, they will have a child. If the woman is menstruating again, before the half of the month is even better.” This passage is to say, the birth of a male to the basis of Yang Qi flourishing, midnight ZiZhi is the Chinese medicine that the day Yang Qi began to flourish time, “before the half of the month” refers to the lunar calendar before the 15th to the first day of the month, is also the month of Yang Qi flourishing half, these two times together, easy to have a boy. This means that if the husband’s overall physical quality (which may refer to the physical and mental aspects of the combination) is stronger than the wife, it is easy to have a boy, and vice versa, if the wife is stronger than the husband, it is easy to have a girl. Qing Wu Daoyuan wrote “Women’s Section Cutting” records: “Dong Yuan cloud: menstrual water before breaking one or two days, the sea of blood began to clean, intercourse into male, four or five days later, the blood vessels have been exuberant, intercourse into female ……. Essence of the hundred veins together to, …… is into the male carry on; blood of the hundred veins together to, …… is into the female carry on. …… male and female intercourse, the male is said to leak, the female is said to throw. …… If male feelings have been light, female intention is not rested, then the male first leak and become female, such as female first throw, and male after the leak, then into the male carry on.” This passage can be understood in this way, in the menstruation just passed when the same room to give birth to male, in the menstruation past a longer period of time with the same room to give birth to female; when the same room, the husband’s sexual excitement is high to give birth to male, the wife’s sexual excitement is high to give birth to female; the husband’s sexual excitement first drop to give birth to female, the wife’s sexual excitement first drop to give birth to male. In the Tang Dynasty, Sun Simiao’s “Prepared Emergency Thousand Gold Essential Formula” records a formula for turning a fetus into a male, “Dan Shen Wan”, which says: “A formula for treating a woman who feels pregnant at the beginning, nourishing the fetus and turning a female into a male. Its composition: “Dan Shen, sequelae, peony, white gum, white atractylodes, cypress seeds, licorice (two taels each); ginseng, Chuanxiong, dry ginger (thirty baht each); Wu Juhua, orange peel, angelica (one tael each); Angelica dahurica, crown dahurica (burnt ashes, one tael each); dried groundnut (one and a half taels); catkin; the above for the final, honey and pill, as big as a wormwood, wine, ten pills, day again, slightly increased to twenty pills. ” This formula originally required that when taken at the time of first pregnancy, it could also turn a female fetus into a male fetus. However, modern medicine has proved that in the sperm-egg union of a moment, the sex of the fetus has been set, will not be subject to external interference and change, so the scientific reasoning above is really very low, not to be believed.