How to determine a baby gender without using ultrasound?

There is an ancient Chinese numerical methodology to calculate a baby gender and it is extremely accurate in the gender prediction but it's not 100% correct.  If you calculate the number to be even but the baby is a boy instead, it means the boy has a female personality. Likewise for the odd number but it turns out to be a baby girl, it means the baby girl has a boy personality.

Add the mother's birth giving age first and then the baby's birth month.  If the number sum is odd, it is a boy.  If the number sum is even, it is a girl.

Example:
Mother birth giving age : 24
Baby's birth month : May
Mother = 2 + 4 = 6
Baby = May = 5
Sum = 6 + 5 = 11, 1 + 1 = 2
Final output is 2 which is even, so the baby is a girl.

Mother birth giving age : 31
Baby's birth month : March
Mother = 3 + 1 = 4
Baby = march = 3
Sum = 4 + 3 = 7
FInal output is 7 which is odd, so the baby is boy.

When an obstetrician is able to tell you your baby birth month, you can predict its gender.  Try it and have fun!