As soda sales heat up, such as soda can lose weight, beauty, alcohol, treat gout, relieve high uric acid and other claims in the community, the most eye-catching rumor is that drinking soda to change the body’s pH, can give birth to a boy. Many couples who are preparing to get pregnant are so convinced that they have even changed their daily water intake to soda. Soda is an alkaline drink, about the effectiveness of its claims, mainly from the concept of human acidity and alkalinity, but due to the lack of sufficient scientific basis for the definition of the human body pH on health effects, the concept in the professional field is not conclusive, and can not be used as a professional basis, excessive consumption of soda may cause harm to the body. In the many “childbirth secrets” circulating online, there is a theory related to acid-base constitution is concerned, that is, eat more alkaline things “to create” alkaline constitution, easy to have a boy, and eat more acidic food to form an acidic constitution after the easy to have a girl. Many young people hold this view in high esteem. The popularity of the acid-base theory is related to some research that the popular Y sperm that determines the birth of a boy is more active in the alkaline environment, and the so-called “alkaline” is not quantifiable indicators, and there is no full scientific basis. Because from a medical point of view, the pH value of the human body is relatively constant, it is impossible to rely on eating which type of food there is a large deviation. In addition, the acidity and alkalinity of food is the scope of food chemistry research, and the acidity and alkalinity of body fluids produced after entering the human body metabolism is not the same thing. On the contrary, if you eat a lot of a so-called alkaline food in order to have a boy, you may also have a nutritional imbalance or even a problem due to partial diet. We should treat soda as normal, there are patients in order to “create” alkaline physique drink a lot of high concentration of soda, strong tea, the result of drinking kidney stones and anemia. The human esophagus and intestines are alkaline environment, but the stomach is an acidic environment, long-term consumption of soda will play a negative role, causing indigestion, alkalosis, etc., light anorexia, nausea, headache, convulsions, heavy coma. At the same time, long-term drinking soda drinks, but also may be too much artificial sweeteners and flavors intake and affect health. In addition, there are many female patients who use alkaline baking soda to douche their vagina in the hope of having a male child. In fact, there are many cases of inflammation caused by imbalance of vaginal flora due to this “secret”, which makes it more difficult for sperm to pass through the vagina and unite with the egg, making it more difficult to conceive a child. What’s even more worrying is that some women often use baking soda to douche their vagina after they have been tested pregnant, in an attempt to make the vagina and even the uterus alkaline for the purpose of “conversion”, but this results in miscarriage, premature birth or premature rupture of membranes. Therefore, it is important not to believe in the rumors of “sex change”, and not to let pregnant women take any prescriptions or hormones, so as not to cause irreparable harm to the health of pregnant women and fetuses.