Predictions have positive results but there are times that predictions are inaccurate in small instances. So, to have a precise prediction you should accurately monitor the day of your ovulation. Selecting the right foods may help your attempts of baby prediction come true. Since the Y sperm can survive more on alkaline environment you have to eat foods high in potassium and sodium. That if you want to have a baby boy, but if you want to have a baby girl X sperm must meet first with the egg cell. X sperm can survive longer in acidic environment than Y sperm.