Food can be divided into alkaline and acidic categories. Some people think that the acidity and alkalinity of food has something to do with having boys and girls. Generally speaking, a woman's vagina is acidic. If alkaline substances are secreted during orgasm, I will eat Kang Sheng boys all my life, and Taobao will find them more suitable for Y sperm to survive and have a higher chance of having boys. If pregnant couples really want to have boys, then in order to increase the chances of having boys, women should eat more alkaline foods, while men should eat more acidic foods to increase the chances of successful fertilization and the combination of Y sperm and eggs.