Using The Neutral Days
There is an average of 75 days per year when the alternating ph of the egg is really strong for each sex. There are other days when it is less strong and we call those "neutral days". The ovulation cycle is sometimes not predictable, it can move around. Normally with some re-adjustment of the menstrual cycle it is easy to combine the expected ovulation window with the conception days for a boy or girl. However if you are over 37 years old and the cycle alteration is not working immediately, you can try to conceive also on the neutral days, avoiding the specific opposite gender days. To do that, you can ask for a double gender calendar. At the same time you can additionally adhere to the diet for a couple of months to give you that extra chance. As we have said the diet should not be followed more than 3 months as more months might create a health hazard!