Recently, there have been patients and friends consulting how to give birth to a boy or a girl, which side of the decision, to be online to collect and organize information for the benefit of patients and friends. In fact, the sex of the fetus is determined by the sex chromosomes in the reproductive cells, male sex chromosomes are (X,Y), female sex chromosomes are (X,X), so the Y chromosome of the male fetus is provided by the male sperm, that is, if the sperm containing X chromosome combines with the egg, then the fetus will be a female, if the sperm containing Y chromosome combines with the egg, then the fetus will be a male, and we can thus see that “The male partner is the main determinant of the birth of a boy or a girl”! Personally, I believe that having a boy or a girl is all about destiny, and health comes first. Pre-embryo fertilization genetic diagnosis (PGD) is the gold standard for controllable, but only sex chromosome genetic diseases are applied. In addition, Chinese medicine folk remedies are also varied, the more famous Qing Palace Diagram birth male and female table, it has been proved that its accuracy rate is not high. In short, the following content, for reference only. Since ancient times, human beings for the birth of a child has a very high expectations and pressure, especially the humanities of the Eastern society, more eager, there are many ways, in the modern scientific, we take you to understand some of the more reliable way and verification. Such as the following ways: a. Vaginal douching method (male alkaline female acid), is based on the research of Professor Watt Berger of Germany, the use of diluted acetic acid (two tablespoons of white vinegar and 1000P warm water) or baking soda (two tablespoons of soda and 1000P warm water) before sex to rinse women’s vagina. Baking soda is used if you want to have a boy, and acetic acid is used if you want to have a girl. The principle is to utilize the fact that X and Y spermatozoa swim at different speeds in environments with different pH values; Y spermatozoa are more likely to swim in alkaline environments, while X spermatozoa are more active in acidic environments. Depth of insertion, control of ejaculation time (perfect sex life is easy to have a boy), the female vaginal opening is acidic, near the cervical opening is alkaline, and the cervix will secrete more alkaline secretions when the woman orgasms. Therefore, it is recommended that couples who want to have a boy should try to adopt a deep penetration position during sexual intercourse, so that the sperms ejaculated during orgasm will be closer to the alkaline cervical opening, and stay for a shorter period of time in the acidic vagina, which will increase the mobility and survival rate of Y sperms, and thus the chance of having a boy will be higher. In addition, when a woman reaches orgasm, it will enhance the alkalinity of the vagina, and ejaculation at this time will also help to increase the chances of having a boy. However, under normal circumstances, it is common for couples to ejaculate too quickly, and it takes longer for a woman to reach orgasm than it does for a man. When you want to have a boy, you can try to wear a condom to reduce the sensitivity of the glans of the penis to prolong the duration of sexual intercourse and to make the woman’s sensuality satisfied. Or prepare a condom, cut off the condom, leaving only the rubber ring, put it in the glans, and then put another one on, which is guaranteed to make your woman orgasmic. Wearing a condom for sexual intercourse, the sensitivity of the head of the penis is reduced, the time to reach orgasm is prolonged, the woman reached orgasm and then remove the condom ejaculation, will not affect the quality of ejaculation, the success rate of the birth of a boy up to 80%. On the other hand, if you take shallow insertion and avoid ejaculation during female orgasm, it will improve the chances of having a girl. Diet control method (the so-called alkaline male and acid female, similar to the vaginal douche method), X spermatozoa prefer acidic, Y spermatozoa prefer alkaline, if you want to give birth to a girl, Mr. eat more alkaline food, Mrs. eat more acidic food; if you want to give birth to a boy, the husband and wife’s dietary habits are interchanged, Mrs. eat more alkaline food, Mr. eat more acidic food. However, it takes about 75 days for spermatogonia to mature from formation to maturity, so if you want to adjust your diet to increase the chances of having a boy or a girl, you have to prepare early, that is, two and a half months prior to conception for both husband and wife to start adjusting their diets to a more conducive environment for X spermatophores or Y spermatophores. (* Acidic foods: chicken, pork, beef, peanuts, oats, rice, noodles, loach, egg yolks, dried scallops, shrimp, eel, clams, octopus, squid, fish eggs and other seafood. ※ Alkaline food: kelp, soybeans, spinach, lettuce, carrots, potatoes, burdock, pumpkin, groundnuts, mushrooms, bananas, strawberries, oranges, apples, coffee.) Spermatozoa separation. Currently, spermatozoa separation utilizes the specific gravity method, the step concentration method or the albumin separation method to separate X and Y spermatozoa with a purity of 70 to 75%, which means that the chances of having a male or a female child after conception are 70% to 80%. The fertilization rate of embedded spermatozoa is only about 20% each time, so it is not a one-time success. V. Pre-implantation Genetic Diagnosis (PGD) (gold standard), the current method to determine the control of the birth of a boy or a girl nearly 100% is the “embryo section identification method”, that is, the use of “Pre-implantation Genetic Diagnosis” (PGD) technology to do in-vitro fertilization (IVF), and so on, when the embryo splits into 6 to 8 cells, the use of the embryo to divide into 6 to 8 cells, the use of the embryo to divide into 6 to 8 cells, the use of the embryo to split into 6 to 8 cells. When the embryo divides into six to eight cells, one or two of the cells are removed by microscopic manipulation, and the sex of the embryo is identified by fluorescence in situ hybridization staining (FISH) or polymerization conception chain reaction (PCR), and the embryo is selectively implanted back in the uterus for implantation. However, this method is complicated, costly, and ethically controversial, except for the investigation of sex chromosome genetic diseases, such as hemophilia, a sex-linked genetic disease, which is most commonly found in males, so that women with the genetic predisposition can use this technique to choose to have a female child in order to avoid giving birth to a male child with the disease. With the development of medical science and technology, more genetic diseases can be diagnosed at an early stage by embryo section diagnosis, so as to avoid the inheritance of diseased genes to the next generation, but the use of this technology to give birth to a boy or a girl is not the purpose of the development of this technology. Sixth, the ovulation day control method, can use the basal body temperature method to measure the time of ovulation, to grasp the beginning of the ovulation of the low-temperature period of intercourse, it is easy to give birth to a man. The opposite is the birth of a woman. (Basal body temperature method: the second day of menstruation, every morning to measure the body temperature (with a basal body thermometer) before ovulation is about 36.5 ℃, the day of ovulation fell to 36.2 ℃, ovulation after the rise of 36.7 ℃. The temperature returns after the onset of menstruation. The safe period is from the third day after the temperature rises to the next menstrual period).