Sex is determined from the time when the fetus forms a fertilized egg. Because the fertilized egg is a new individual composed of 23 pairs of chromosomes from the father and the mother, one pair of chromosomes plays a decisive role in the process of sexual development, which is called sex chromosome. Sex chromosomes X and Y determine the sex of the fetus. The XX zygote develops into a female, and the XY zygote develops into a male. However, the primordial gonads did not begin to develop until the embryo was six weeks old. If the embryonic cell does not contain the Y chromosome, or the short arm of the Y chromosome lacks the gene that determines the male sex, the gonad will slowly differentiate.
In fact, the sex of a fetus is determined from the moment when sperm and eggs combine to form a fertilized egg. There is no way to change it by artificial means. First of all, we need to know the whole fertilization process. When men and women have the same room, sperm enters the female body, and the semen liquefies in the cervix, smoothly passes through the cervical cavity, reaches the female fallopian tube, and the female ovary discharges eggs. Therefore, sperm will successfully combine with eggs through their own efforts to form fertilized eggs. The fertilized egg will reach the female uterus through the fallopian tube, successfully implant into the uterine wall, and then slowly develop into an embryo.
According to scientists' research on food, people find that some foods are acidic and some are alkaline. If a couple really want a boy in the process of family planning, pregnant women should eat more alkaline foods to increase the chances of having a boy, because these foods can balance the pH value of the human body, make the human body alkaline, and increase the chances of successful fertilization and the combination of Y sperm and eggs. Generally speaking, alkaline foods include fresh vegetables, milk, Liu Ding, bananas, kelp and so on.