The method of calculating the birth of a boy or a girl on the Qing Gong Chart is unscientific, and neither the age of the man nor the age of the woman, nor the month chosen, determines whether a boy or a girl is born.

The birth of a boy or a girl is determined by the male y-sperm, and the moment the sperm and egg unite they are already destined to be a boy or a girl.

The amount of sperm that a man produces each time is 2ml to 6ml, and the normal number of sperm in each milliliter of semen is more than 20 million, of which the ratio of x and y sperm is 1:1,

So the birth of a boy or a girl is a random, natural selection.

Conditioning the sperm quality and increasing the number of y-sperm can increase the chance of having a boy.

y

Sperm survives for a long time in an alkaline environment, and the woman eats more alkaline food to regulate the body's pH environment. At the same time to detect ovulation, ovulation day intercourse can also increase the chances of having a boy.

It should be noted that these can only increase the chances of having a boy, but not guarantee a boy. There is also no technology that can guarantee the birth of a boy.