Calculation method of pregnant boys and girls

According to the following three calculation methods, we can predict the results of giving birth to boys and girls during pregnancy.

Addition and subtraction calculation method

Pregnancy 68+ lunar month-the imaginary age when the mother is pregnant =, and the mantissa is single, which is a boy; The mantissa is double. It is a girl.

Cardinal calculation method

49 (unchanged)+lunar month when pregnant-imaginary age of mother when pregnant+19 (unchanged) The result is that if the result is even, it is a girl, if the result is odd, it is a boy.

Age calculation method

The sum of the father's age at the time of pregnancy+the mother's age+the number of months of pregnancy (both real numbers) is divided by 3, and the result is an integer, the odd number is a boy, and the even number or zero is a girl.