Calculation method for boys and girls
Formula calculation method
68+ lunar month of pregnancy–the nominal age of the mother when she was pregnant =, and the mantissa of the result 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) result, 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 are real years) 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.
Date calculation method
Date of birth of prospective father (year+month+day)+date of birth of expectant mother (year+month+day)+date of pregnancy of mother (lunar month)-number 19=, depending on the mantissa of the last number. If it is odd, it means having a boy; if it is even, it means having a girl.